This is a /dev/crypto device driver, equivalent to those in OpenBSD or FreeBSD. The main idea is to access of existing ciphers in kernel space from userspace, thus enabling re-use of a hardware implementation of a cipher. It was initially written for linux 2.6.8 by Michal Ludvig. Compatibility fixes for *BSD cryptodev as well as porting to 2.6.27 blkcipher API by Nikos Mavrogiannopoulos. Initial blkcipher async API porting by Michael Weiser. Maintained by Nikos Mavrogiannopoulos (nmav [at] gnutls [dot] org)