>authenticates with HMAC to protect against adaptive chosen-ciphertext attacks Okay... >TripleSec "macs" with a concatenation of two HMACs: HMAC-SHA-512, and

>authenticates with HMAC to protect against adaptive chosen-ciphertext attacks Okay... >TripleSec "macs" with a concatenation of two HMACs: HMAC-SHA-512, and HMAC-SHA3 Why?