CryptoLib
CryptoLib provides a software-only solution using the CCSDS Space Data Link Security Protocol - Extended Procedures (SDLS-EP) to secure communications between a spacecraft flight software and ground station. CryptoLib was originally designed as a Core Flight System (cFS) spacecraft library but has recently expanded in scope to become more generic and support telecommand encryption using gcrypt.
To get started with CryptoLib, you can visit the GitHub repository maintained by NASA. The documentation provides detailed information on usage, configuration, and testing.
