The FREE Cybersecurity Glossary by Thor Pedersen!

Rapid Application Development (RAD): A software development methodology that emphasizes rapid prototyping and iterative feedback over traditional lengthy planning and design phases. It focuses on quickly developing and adapting software solutions using agile techniques and low-code platforms to meet evolving user needs efficiently.

Relational Database Management System (RDBMS): A type of database management system that uses a relational model to organize data into tables and establish relationships between them. Used in database management and data analysis. Examples -MySQL, Microsoft SQL Server, Oracle Database.

Relational database model: A data model that represents data as a set of formally described tables from which data can be accessed or reassembled in various ways without needing to reorganize the tables themselves. This model was conceived by E.F. Codd, and it forms the theoretical basis of relational databases. It uses a standard method to store and retrieve data and is widely used due to its simplicity, flexibility, and efficiency.

Remote Authentication Dial-In User Service (RADIUS): A networking protocol that provides centralized authentication, authorization, and account management for users who connect and use a network service. With RADIUS, rather than managing user authentication at each network access server, it's managed from a central server. This enhances security and simplifies administration as changes like adding a user or modifying a password only need to be made one time at the central server.

REST (Representational State Transfer): An architectural style for designing networked applications. It uses a stateless, client-server communication model, where each message contains all the information necessary to understand and process the request. REST is often used in web services development due to its simplicity, scalability, and performance. The principles of REST encourage the use of HTTP methods, URIs, stateless communication, and cacheable data, among other things, to build efficient and user-friendly web services.

RFC 2104: A Request for Comments (RFC) that specifies the HMAC (Hash-based Message Authentication Code) construction for creating a message authentication code derived from a cryptographic hash function and a secret key. HMAC is widely used for data integrity and authentication, ensuring that messages are not altered or tampered with in transit.