3 ms·Is it really using CFB mode without any kind of authentication? If so, mostly useless...by brohee 11y agoIs it really using CFB mode without any kind of authentication? If so, mostly useless...dchest 11y agoIt actually uses HMAC-SHA256 to authenticate ciphertext, although with the same key as AES encryption.brohee 11y agoIt's worth mentioning it on the homepage, it looks very scary without it.