Node js security tutorial jobber

Full stack developer to maintain and enhance a web application which is now in production Key technologies- vue js, web applications, api , production support , gcp

I'm in search of a talented web developer who is proficient in HTML, CSS, JavaScript, and React JS. Your familiarity with React and Angular is a big plus. The ideal candidate should also be adept at creating an e-commerce site and have a knack for user registration/login systems and responsive designs. Key Project Requirements: - Proficiency in HTML, CSS, JavaScript, and React JS - Experience with Angular - Creation of a user registration and login system - Development of an e-commerce functionality - Strong portfolio creation abilities - Skilled in creating responsive design for websites Your role will be pivotal in the creation of a comprehensive website that is user-friendly, visually appealing, and capable of handling e-commerce transactions. Please be ready to s...

Hello^^^^. I'm using Amazon AWS and would like to request server maintenance. First of all, I would like to ask you to do as much as possible for server security and privacy, such as SSL installation, automatic backup once a day, DDOS attack prevention, system performance optimization, hacking prevention, encryption between data transmissions, real-time monitoring, data recovery, backdoor checking, backdoor checking and deletion of compromised files, attack root identification and blocking, suspicious process occupation identification and recovery, server hacking analysis, server access history tracking, password recovery and complexity setting, virus and malicious software checking,,data leakage prevention.....etc My current monthly budget is about $50, Please send me a prop...

I require an exper...Linux developer with a solid background in server administration, particularly security and firewall configuration. The primary focus is on enhancing system stability through secure server management. Key tasks and skills: - Server Administration: You should be proficient in maintaining and optimizing Linux servers. - Security Management: Understanding of security principles and best practices is essential. - Firewall Configuration: Expertise in firewall management and configuration. - Problem-solving: Ability to troubleshoot and resolve issues to ensure system stability. Please note that this is a long-term project, so commitment and reliability are important. If you have a proven track record in server security and Linux system managem...

I need a professional video creator to develop three high-quality, engaging explainer videos for my business. The explainer videos serve the following purposes: 1. Introduce: A video to explain who we are as a business. 2. Listing Tutorial: A video illustrating how someone can list an item on our platform. 3. Hiring Tutorial: A video demonstrating how someone can easily hire an item through our platform. Key Project Requirements: - Motion Graphics: The videos should be created in a motion graphics style. - Length: Each video should ideally be 1-2 minutes long. - Script: I already have fully prepared scripts for each video, so the main task would be to bring these scripts to life. Ideal Skills and Experience: - Proven experience in creating high-quality explainer videos, e...

a full presentation about cyber security in AAM In Arabic

I'm look...System: - The platform should support multiple payment options including: - Cash on Delivery - Online Payment (credit/debit card, net banking) - Wallet Payments The ideal candidate/team for this project should have a proven track record in developing similar platforms and should be proficient in backend and frontend development. Strong knowledge of payment gateway integration and security protocols is highly desirable. While the client did not specify a preferred technology stack, your proposal should include your recommended tech stack and the rationale behind it. The client is open to suggestions and is looking for a professional who can guide them through the best options for this project. Please share your portfolio and any relevant experience in...

...Geofencing area where the events will be surcharged. Google map API integrated. Rank Math plug in to be integrated. SEO Friendly website Ideal candidates for this project should have: - Proficiency in Magento, along with Python or PHP - Prior experience in developing custom e-commerce websites - Strong understanding of user experience and interface design - Ability to ensure a high level of security for transactions - Experience with integrating and customizing booking platforms with e-commerce sites. If you believe you have the skills and experience necessary to deliver on this project, I'd love to hear from you. I had time wasters so please be aware this time I will rate based on the service provided. Please read and understand this. English competency preffered and I a...

I need help setting up my nextjs website's cookie consent to be compatible with Google Consent v3. Key Requirements: - Write codes to setup cookie consent with google tag manager. - Ensure the cookie consent setup is specifically for Google Consent v3 compatibility. - Make sure the setup with Google tag manager. Ideal Skills: - Next js. - Familiarity with Google Consent Mode v3.

I need assistance with updating content and images on my website, and creating a contact form specifically for booking appointments. Key Requirements: - Add both text and image content: The website requires new text and image content. ...essential for this task. Ideal Skills: - Proficient in HTML and Wordpress: You should have a solid background in HTML and Wordpress to ensure that the new content seamlessly integrates with the existing website structure. - Experience in creating contact forms: You should have experience in creating user-friendly contact forms, preferably for appointment booking purposes. Experience with form security and anti-spam measures is a plus. If you're confident in your ability to deliver high-quality work within a reasonable timeline, I'd lo...

I'm in need of an expert who can help me with setting up Genie ACS on Ubuntu for manag...management system. Key responsibilities: - configure Genie ACS on Ubuntu - Set up the system to manage routers and modems remotely - Ensure the system is fully functional and secure Ideal candidate: - Proficient in Ubuntu and network management - Extensive experience with Genie ACS for remote device management - A strong understanding of TR-069 protocol - Excellent troubleshooting skills - Strong security background to ensure the system is robust I'm looking for someone who can work efficiently and independently to deliver a reliable remote device management system. Your experience with TR-069 protocol and Genie ACS should be at an expert level to ensure the successful implementat...

I am looking for a seasoned mobile app developer to create a social networking application geared towards professionals. Key Features: - User Registration and Profile Creation - Messaging System - Networking and Connection Building Features - News ...and Recruitment Section - In-App Search and Filter Functions - Notification System - Integration with Existing Social Media Platforms Skills and Experience: - Proficient in mobile app development - Previous experience in creating social networking applications - Strong understanding of user experience and design principles - Ability to integrate various APIs - Familiarity with data security and privacy standards This is a unique project and I am looking for a freelancer who can bring creativity and innovation to ...

We are looking for a programmer to create the search engine for our magento 2.4.6 with Proto Theme website using A...website using Algolia search. The programmer has to implement the algolia search engine using his own code following the guidelines published by Aloglia to use it in the main page and in the search results page. It must include the following Filtering by attributes ( brands, specific attributes, color, etc) Keyword filtering Filtering by categories The search results should be displayed in a js block on the home page and in the search results. The theme used in magento 2.4.3 is "Fatest by codazon". Please only serious people, we don't want people who spend half as much time searching as doing the work on stackoverflow. Some examples of how we w...

Necesito que alguien me haga una isla a traves de un tutorial que te explica paso a paso como se hace.

I'm looking for a proficient web developer to create an intuitive, user-friendly courier website. Essential features of our project should include: - An efficient online tracking system for all courier packages - User registration and login - Practical, simple-to-u...facilitate seamless online transactions, thus, the inclusion of a payment gateway is imperative. The website needs to support national courier services only. Additional features may be requested, but these will be communicated further during a phone discussion stage. Ideal experience and skills: - Proven experience in building similar platforms - Understanding of logistic systems - Proficiency in web security - E-commerce understanding - Familiarity with common payment gateways - Effective communicator and respo...

I need a solution that can automatically insert page numbers onto every A4 page in my document at the bottom. Key Requirements: - The system should work with A4 format. - It should be able to insert these page numbers automatically and consistently on every page. - The page numbers should be placed at the bottom of each page. Ideal Freelancer: - Experience working with PDF manipulation and automation. - Proficient in software that can perform automatic page numbering. - Attention to detail in maintaining consistency in design and positioning of the page numbers.

As a rapidly expanding business, I need a highly skilled freelancer who can manage and configure my server on a regular basis. This includes Windows setup and firewall installation, to ensure security and prevent unauthorized access. In addition to the regular maintenance, the project involves management and setup of WordPress and Odoo on my server through Bluehost. The chosen freelancer would be responsible for the correct installation and efficient running of these applications. Specific tasks include: - Server management - Windows setup and configuration - Firewall installation and configuration - WordPress and Odoo implementation and management - Bluehost hosting management and configuration and any web hosting i can install and design and edite template and oages The ide...

I need a seasoned professional who can provide me with comprehensive support on major projects and tasks completion. The role involves assisting in project planning, task man...management, and troubleshooting, along with other related activities that could improve my efficiency and productivity. The ideal candidate should be proficient on following:- Task would related to this :- Load testing architecture Created infra in azure (VM's, synapse load balancer, DNS mapping) Internal VM configuration Nginx conf files change (private IP, domain) Azure VM network security group rules DNS mapping in Cloudflare Majorly daily daily work would be on :- Jenkins build, And Deploy in Azure (VMs, Tomcat) and Azure Devops Interaction with CloudFare, Azure Redis Site 24x7 and...

I'm in need of a proficient web developer to construct a comprehensive client portal for my law practice. This portal will be instrumental in streamlining my interactions with clients, providing a secure and efficient platform for com...permissions. Ideal Candidate should have: - Experience in developing secure client portals - Familiarity with legal industry requirements - Proficient in web development languages and frameworks - Strong understanding of user role management - A portfolio showcasing similar projects completed - Ability to adhere to strict confidentiality protocols Please include your approach to ensuring data security and any previous work with legal clients in your proposal. Looking forward to building a robust system that enhances the efficiency and privacy ...

I have a project that requires the development of a robust Android application. Key Requirements: - Development of a comprehensive Android application with 18 screens - Integration of 12-14 APIs to ensure seamless functionality - Design and implementation of a user-friendly UI/UX - Optimization for performance and security Designs, icons and api's will be provided by us Time 10 days

I am seeking expert app developers to create a multi-platform application - compatible with both iOS and Android, aimed to connect patients and doctors seamlessly. Key Functionalities: Patient Use: - Ability to book appointments - Access to check doctor's availability - Facilitate online ...appointments - Access to check doctor's availability - Facilitate online consultations Doctor Use: - Efficiently manage appointments - Send notifications to patients - Gain access to patient medical records Ideal candidates should have a strong background in healthcare application development, expertise in both iOS and Android platforms, and a keen understanding of HIPAA compliance and medical data security. Proficiency in UX/UI for easy navigation for both patient and doctor inte...

...will cater to a user base of less than 50, but it needs to be designed and optimized for scalable growth. It should be intuitive, easy to use, and have a professional interface. Key features that need to be incorporated into the app include: - Real-time inventory tracking - Sales and purchase order management - Product barcode scanning As the app will be handling crucial data for my business, security and reliability are of utmost importance. The developer should have experience in creating and integrating secure databases, as well as a track record of building robust, scalable applications. The successful freelancer should have: - Proficiency in Google AppSheet and MySQL - Experience in developing inventory management systems - A keen eye for user experience and interface de...

I'm in need of a gambling website that offers a comprehensive experience to users. The site should incorporate sports betting, a variety of casino games, and poker. Key features: - Incorporate all three types of gambling activities (Sports betting,...the site is user-friendly, engaging, and responsive on different devices - Implement mechanisms for responsible gambling and compliance with relevant regulations I'm looking to have this project completed within a month, so a quick turnaround is necessary. Ideal skills: - Proficiency in full-stack web development - Experience in creating gambling or betting websites - Strong understanding of security and compliance measures in the gambling industry - Ability to integrate various payment gateways - Knowledge of responsible...

Need support for react web applications i.e., small and medium enhancements to connect daily for 1 hour. Strong react basics including huge knowledge in CSS with Javascript and node js required.

...in identifying trends, analyzing performance, and making informed business decisions. - Order Processing: The software must be capable of processing orders efficiently and accurately. This will help in reducing errors, improving customer service, and maintaining a good reputation in the market. sending order to clients unleashed ready for shipping. - ISO27001 or similar control to protect data security. The ideal candidate should have: - Extensive experience in software integration, particularly in cloud-based systems. - Proficiency in Unleashed software is highly preferred. - Strong understanding of inventory management and sales tracking. - Excellent problem-solving and communication skills. - A proactive and customer-centric approach, with a keen eye for detail. ...

I'm looking to create a football skills improvement guide focusing on dribbling, shooting, and passing. The target audience is at an intermediate level of experience. Key Deliverables: - A comprehensive written guide that explains and demonstrates techniques related to the aforementioned football skills - Tips and exercises designed to improve these skills - Clear and concise ex...explanations that are accessible to an intermediate level audience Ideal Candidate: - Prior experience in playing or coaching football - Proven track record of creating educational content - Familiarity with football skills improvement techniques at an intermediate level - Excellent writing and communication skills in English Please note that I'm specifically looking for a written guide and not a vi...

I'm looking for an experienced NodeJS and JavaScript programmer to help me with a school project focused on exploring cybersecurity concepts. Key Requirements: - The task involves writing a client request to obtain a flag from a vulnerability site with advanced complexity (e.g., bypassing security measures). - The project involves emphasizing on Remote Code Execution (RCE) and pollution while interacting with the vulnerability site, so experience in these areas is a plus. --- Challenge Name: Emu Apothecary Category: Vulnerabilities Description has just opened up their potion brewing website for other Emus to create new potion recipes! However, they are afraid that one of the human hackers will pollute their ingredients. Can you get Remote Code Execution (RCE) on the Em...

...store, with a recurring Monthly rental. We need to be able to add a flat shipping cost to our product. We need to add specific details to the transaction , such as : Date required and measurements on payment form Request for call back where they enter the date and time Return/refund request submission form A page to add product videos A members only page (after payment ) that gives access to tutorial videos AI chatbot (if possible ) Ideal Skills: - Proficiency in Wix: You should have a proven track record of working with the Wix platform, understanding its nuances, and being able to utilize its features to their full potential. - Web Design: While the new pages are content-focused, a good sense of design and layout is necessary to ensure the website looks cohesive and p...

...to help create a variety of corporate videos and infographics for a Restaurant Wholesale Food Distributer App and website. Key Responsibilities: - Creating engaging promotional videos: I need visually appealing videos for Application advertising purposes. - Developing clear explainer videos: My business's products and services need to be clearly explained to my audience. - Crafting informative tutorial videos: These will guide my audience on using our products and services effectively. - Designing infographics: I also need relevant and visually appealing infographics to support my video content. - I need 6 Videos 30 seconds long. The ideal candidate should have: - Proven experience in creating corporate videos. - Solid understanding of graphic design principles. - Profici...

I am in search of a skilled mobile app developer who can assist me in creating an Android app with a primary focus on cyber security. The app is gearing towards safeguarding customers from online frauds. Key Responsibilities: - Develop an Android application from scratch - Implement cyber security features that will shield users from online frauds - Ensure the app is user-friendly and has an intuitive design I'm looking for a developer with: - Proven experience in Android app development - A strong understanding of cyber security principles - Ability to implement encryption and other security features - Knowledge of Android development best practices - Good communication skills to understand the project requirements and deliver the expected results. If ...

...project. - Include clear instructions for configuring the WebSocket server URL, notification settings, and any other necessary configurations. - Error Handling: - Implement robust error handling and provide informative error messages. - Ensure the plugin handles network interruptions gracefully and attempts to reconnect as needed. - Security: - Ensure secure communication between the app and the WebSocket server. - Implement necessary security measures to protect the data being transmitted. Deliverables: 1. Fully functional PhoneGap/Cordova plugin for Android and iOS. 2. Source code with clear and concise comments. 3. Documentation on installation, configuration, and usage. 4. Example project demonstrating the plugin in action. 5. Support for initial setup a...

Hi Simmi, I will be configuring spring security in your app. It will be based on the existing struts app. Thanks Sabareesan

...Spring framework for implementing a role-based security setup in my project. Key Requirements: - Strong background in Java programming - Proficiency with Spring Boot and Spring Security - Significant experience in role-based security implementation - Familiarity with securing endpoints in web applications Your task will mainly involve: - Incorporating role-based security in secure endpoints - Limiting user access and functionality based on their roles - Ensuring that the security configurations are robust and effective - Maintaining the performance and scalability of the system post-implementation Ideal candidates should have prior experience in similar projects and be able to demonstrate a solid understanding of Java, Spring Boot, and Spring Sec...

...Notification System (In-App, Push) Other Key Features: - Secure Admin Authentication - User Management (Roles, Permissions) - Content Packaging & Distribution - Content Localization - Import & Export Functionality - Settings & Integrations - Security & Compliance - Performance Monitoring & Optimization The ideal candidate should have: - Proven experience developing admin dashboards - Expertise in Flutter, Firebase, PHP - Strong design sense for clean UI/UX - Knowledge of user management, data viz, content systems - Ability to ensure security, performance, compliance Your role will be to implement these features using PHP (or else) and Firebase. I'm open to suggestions and improvements on the features list. Please provide examples of your ...

I have an Amazon security audit and they require a Penetration Test of my windows desktop application. What I need is a automated tool to test and provide a report that shows my application does not have security issues and is not accessible from the web. There is no end-point to my application as it is not web facing and is a stand alone application. This is to satisfy Amazon security review. I'm looking for a skilled professional to conduct a penetration test on my Windows desktop application. Key Requirements: - Conduct a automated penetration test specifically tailored for a Windows desktop application. - Ensure the test covers all potential vulnerabilities and security risks. - Provide detailed reports on the findings, including any exploits,...

I'm looking for a talented designer who can create a modern and minimalist logo to represent my security company APH Commissioning. The company works with ACCESS CONTROL, CCTV AND INTRUDER ALARMS! Key Requirements: - The primary goal is to establish a strong brand identity through the logo. It should be memorable and easily recognisable. - Potentially reference CCTV, ACCESS CONTROL OR INTRUDER ALARMS. - I'm open to suggestions regarding the color scheme. Feel free to propose a palette that you believe suits the modern and minimalist style. Ideal Skills: - Proven experience in logo design, especially in creating logos that emphasize brand identity. - A strong portfolio showcasing modern and minimalist design aesthetics. - Excellent understanding of color psychology in de...

I need a Figma expert who can take my specific design idea and turn it into a comprehensive prototype for a community yellow pages app. This prototype will be key to visualizing and testing the app's functionality before the development stage. Key Project Requirements: - Proficiency in Figma: You should be skilled in utilizing Figma's features to create a professio...of the purpose of each feature within the app. Below is a link for what I created so far in Figma. I would like to improve the design and add a few more pages to the prototype as well as make it more user friendly for testing. The app will be similar to below pages where the user can search for businesses in the community.

...or other settings. The primary reason for this change is to ensure that the contact information displayed is up-to-date. Key requirements include: - Updating the admin email: The new email address will be provided to the selected freelancer. - Maintaining username and password: It's crucial that these details remain unchanged. - Preserving other settings: The current configurations, including security measures and other account settings, should not be affected. Ideal skills and experience for this job: - Proficiency in WordPress: The ideal candidate should have a strong background in WordPress development. - Experience in working with user accounts: Prior experience in changing user account details, such as emails, would be highly beneficial. - Attention to detail: Given ...

I'm in search of a skilled .Net mobile developer to finalize my .Net Maui mobile application. The key tasks include: - Implementing the logic, specifically around user interface interactions. - Although user authentication, data synchronization, and push notifications were not explicitly mentioned, familiarity with these aspects would be advantageo...both .Net and Maui and can confidently complete the application. Ideal skills and experience: - Proficiency in .Net and Maui - Experience in mobile application development - Understanding of user interface interactions - Knowledge in user authentication, data synchronization, and push notifications will be an advantage. Figma UI: Swagger attached

I'm looking for a skilled professional to assist me with security and compliance testing on my website. Key Responsibilities: - Perform security testing: The main goal is to perform security testing on my website. Please ensure you have experience in this area. - Compliance Testing: I require a freelancer who is knowledgeable in compliance testing. Please Note: - It would be beneficial if you have experience with PCI DSS, HIPAA and GDPR compliance standards. - If you have the skills, please get in touch. I look forward to hearing from you.

I'm looking for someone who can help craft UPSC civil services (CSE) mains exam questions for a coaching institution. Here are the details: - The questions should cover various subjects, with a primary focus on Science and Technology, Internal Security, and Indian Society. - The level of difficulty for these questions should be medium, striking a balance between challenging and accessible. - The end goal is to use these questions for mock exams, so they should be suitable for this purpose. Ideal candidates for this job would have experience with question framing, particularly in the context of competitive exams like the UPSC. I'm looking for someone who can provide a good mix of comprehension, analytical, and application-based questions, consistent with the medium diffi...

...ecommerce is up and running and fully operational and we need a FULL STACK developer that can code in ALL AREAS of the webapp. - Frontend: React (JavaScript) - Backend: Node.js - Services: Python - Database: MySQL RESPONSIBILITIES: - Integration of new B2B APIs - New payment gateway integration - - Implementation of bug fixes and performance improvements. - Regular software updates and security patches. - Feature additions and enhancements. Skills and Experience: - Proven experience in maintaining e-commerce solutions. - Proficiency in React, Node.js, Python, and MySQL. - Strong problem-solving skills. - Excellent understanding of software best practices and design patterns. - Ability to work independently and meet deadlines. - .NET and are a plus but not a requirement. Pre...

...assessing and enhancing our client's DDoS protection mechanisms, incident response processes and overall security posture. Budget: ~$7000 Location: Riyadh (Onsite) 60 Days Responsibilities: - Review and assess the configuration and setup of DDoS protection systems, including network and application layer defense mechanisms - Evaluate the effectiveness of existing cybersecurity incident management processes, procedures, and playbooks - Assess DDoS detective and preventive controls from a technology infrastructure and security perspective - Audit the configuration and setup of network appliances (routers, switches, firewalls) for security best practices - Review and optimize the SIEM (Security Information and Event Management) solution's use cases f...

I need to run TTS wine voices from Linux in docker. I found two tutorials that explain how. Or I need a developer to go through each tutorial and see if you can run the wine gui environment from a docker. Then package that solution as a Docker image I can run locally on lubuntu 22.04. I would do it myself, but I don’t have much experience with docker Requirements: 1 Install balabolka in wine - 2 Install cli balalbolka “bconsole”

I'm in need of a professional who can update config which utilized ESRI's cloud builder tool on Azure. Specifically, the role requires assisti...the ArcWeb server, transforming a site created in IIS to be public-facing. This includes making the site accessible from the internet with a basic level of security, such as HTTPS. Key Responsibilities: - Configure ESRI Cloud Builder tool on Azure - Make existing IIS site on ArcWeb server public-facing - Implement basic security measures (e.g., HTTPS) Required Skills and Experience: - Proficiency in ESRI/ArcGIS platform - Experience with ESRI's cloud builder tool - Familiarity with Azure cloud services - Strong knowledge of web server configurations, particularly IIS - Prior experience in setting up public-facing si...

Requirement: experience in Node.js building applications and experience in migrating the monilithic application to microservices architecture applications. Experience in kafka for queuing. Experience in mongodb for database and angular for frontend. PS: This project is a very good opportunity for the developers who wants to learn development from scratch using modern micro service architecture This is a to support my job opportunity. Consultancies and companies please stay away. Need someone with good experience on NodeJs to help me understand my project, resolve blockers and provide constant feedback to improve myself.

I'm in need of an experienced professional to assist with setting up Apache for Cognos12 on Linux. Key Responsibilities: - Perform a comprehensive Apache configuration to ensure compatibility with Cognos12 Required Skills: - In-depth experience with Apache configuration - Proficiency with Linux operating syste...Perform a comprehensive Apache configuration to ensure compatibility with Cognos12 Required Skills: - In-depth experience with Apache configuration - Proficiency with Linux operating system - Understanding of Cognos12 architecture Moreover, I would like to implement specific directory access restrictions as part of the setup to enhance security. Desired Skills: - Knowledge in implementing directory access restrictions - Awareness of best practices in security...

I'm in need of a skilled developer to create a mobile application that's functional on both iOS and Android plat...Experiences: - Proven expertise in iOS and Android application development - Experience with communication platforms and file sharing capabilities - Demonstrable understanding of data security standards and protocols - Excellent UI/UX design skills - Ability to debug and optimize for performance across platforms An ideal candidate will have a portfolio showcasing previous related work. I encourage those experienced with cross-platform mobile application development, particularly those who have developed communication applications with file sharing elements, to place a bid. Note that an understanding of user-end data security is essential to this proje...

...should cater to both desktop and mobile users. Key Requirements: - Develop a user-friendly and secure platform for sports betting using cryptocurrencies. - Ensuring the website is optimized for both desktop and mobile platforms to ensure seamless user experience. - Implement a simple, yet functional user account system. Ideal Skills and Experience: - Proficient in cryptocurrency integration and security to facilitate betting transactions. - Experience in sports betting or online gaming platforms. - Strong background in web development, with a focus on user interface and experience design. - Prior experience with developing and optimizing websites for desktop and mobile platforms. Details of betting Application Description: Blockchain Betting Site Overview: This application ...

I am looking for an experienced blockchain developer with expertise in the creation of Decentralized Applications (DApps). - The aim is to develop a DApp for our online cheque clearance and verification system. - Key features should include cheque scanning and image recognition, real-time verification with banking databases, and an audit trail with full transaction ...should have a strong knowledge of smart contract development and proven experience with similar financial services applications. - The optimal freelancer would understand the ins and outs of creating secure, efficient, and user-friendly systems. Your bidding proposal should demonstrate your understanding of the special considerations needed for the financial industry particularly around data security and system r...