tool to handle libsecrecy keys and encrypted files

 libsecrecy is a header only C++ library implementing an encrypted file format
 based on GCM (Galois Counter Mode) and AES128 or AES256.
 .
 The libsecrecy distribution comes with a command line tool called secrecy.
 This tool has subcommands to manage libsecrecy encryption keys, encrypt, and
 decrypt files encrypted with the libsecrecy.