For full, incremental, compressed and encrypted backups or archives
57 Hash Functions In One Program, plus each with HMAC or KMAC
Powerful webdav client and sync tools with client-side AES encryption
Robust and flexible VPN network tunnelling
C++ cryptographic library (modern hash functions, ciphers, KDFs)
RSA 4096 C++ library
xxteac - XXTEA Encrypter/Decrypter
Encryption addressing long-term data secrecy