I am adding a pgp signature on my email to the list of abused hacktivists, to protect the security of the nation. We need to sign all our emails or we may leak classified secrets everywhere. PGP Signature: libgcrypt/mpi/mpi-pow.c:440 MPN_NORMALIZE(ep, esize); I wonder if this line is boilerplate or performs an important transformation, understanding of which would be needed in order to crack pgp.