C++ header only library for random access to encrypted files

 libsecrecy is a header only C++ library implementing an encrypted file format
 based on GCM (Galois Counter Mode) and AES128 or AES256.
 .
 It uses nettle routines for file encryption and decryption via GCM using
 AES128 or AES256 as cipher function and gpgme for key storage.
 .
 While encryption is currently only supported in a streaming fashion,
 decryption allows random access in the encrypted file due to independently
 encoded subunits.