-Supported modes of operation: CTR, ECB, CBC, XTS, OCB and arbitrary long keystream.
-OCB mode does not use Skein hash function to hash and verify message, instead, it does
-a single pass crypt and verify, thus, it is faster than other modes when both crypt and verify.
+Additionally, this version provides a way to virtually "extend" key size to 1280 bits,
+by enabling "fullkey" option or changing "do_full_key" default setting in tfcrypt_defs.h.
+In this mode, tweak is ignored, and filled with extended key material.