This article explains SSH as a secure remote login protocol, covering its encryption principles, protection against man‑in‑the‑middle attacks, password and public‑key authentication methods, key generation commands, and essential configuration files like known_hosts and authorized_keys.
This article explains RSA’s history, key generation steps, encryption and decryption processes, the mathematical foundations behind its security, practical considerations like key length and random number generation, and common application scenarios such as secure communications, digital signatures, and authentication.
This article explains OpenSSL’s origins, its role in encryption on CentOS, common use cases such as web servers and database security, provides step‑by‑step installation and upgrade commands, and demonstrates how to generate RSA, SM2, AES, and SM4 keys via the OpenSSL command line and Java alternatives.
This article explains the principles, system design, key generation, encoding strategies, HTTP redirection techniques, and step‑by‑step Spring Boot project setup needed to build a reliable short‑link service for marketing and internal applications.
