We submitted SequenceHash to C2SP. It's a new cryptography spec that prevents a common class of bugs by safely combining multiple inputs into a single hash with any hash function.

Think TupleHash, generalized so it works on top of SHA-256, BLAKE2, or any underlying hash function. The draft is open for review on C2SP, part of our ongoing contributions to open cryptographic standards. https://c2sp.org/sequencehash