-Sending Initial Vector (IV) = hash(0 | KEY | HASH)
-Receiving Initial Vector (IV) = hash(1 | KEY | HASH)
-Sending Encryption Key = hash(2 | KEY | HASH)
-Receiving Encryption Key = hash(3 | KEY | HASH)
-Sending HMAC Key = hash(4 | KEY | HASH)
-Receiving HMAC Key = hash(5 | KEY | HASH)
+Sending Initial Vector (IV) = hash(0x0 | KEY | HASH)
+Receiving Initial Vector (IV) = hash(0x1 | KEY | HASH)
+Sending Encryption Key = hash(0x2 | KEY | HASH)
+Receiving Encryption Key = hash(0x3 | KEY | HASH)
+Sending HMAC Key = hash(0x4 | KEY | HASH)
+Receiving HMAC Key = hash(0x5 | KEY | HASH)