anton-petrov/rsabackdoor

This repository demonstrates a concept that sounds like it belongs in a spy novel: hiding a secret value inside a public encryption key. Specifically, it shows how to embed a predefined number into an RSA public key. For the average person, think of RSA as a type of digital lock. The project illustrates a way to subtly alter the lock so it contains a hidden mechanism that only the creator knows about. At a high level, RSA encryption relies on a pair of keys: one public, which anyone can use to lock data, and one private, which only the owner uses to unlock it. The project works by manipulating the mathematical rules that generate these keys. By inserting a specific number into the public key during its creation, the author makes it possible to bypass the normal security, provided you know the secret value was placed there. The primary audience for this code is likely security researchers, cryptography students, or anyone interested in how backdoors are constructed in software. For example, a cybersecurity professor might use this project to teach a class about the dangers of using unverified encryption tools. It serves as a concrete example of how a developer could intentionally weaken a system while making it appear secure to the outside world. The repository is written in C# and its README is completely empty. Because there is no documentation, anyone looking at the code will need a basic understanding of cryptography to figure out exactly how the implementation works. The project appears to be purely educational, meant to prove a concept rather than to be used in any real-world security application.