> Using strong and secure algorithms solves that (and other) problems but can also introduce noticeable latencies at the same time, due to the overall number of necessary cryptographic operations.
My knowledge of crypto is a bit rusty. What are some 'strong and secure' commutative cryptographic algorithms?
ElGamal can be used, for example – you find a discussion of possible encryption schemes for Mental Poker in this paper[1] for example, but it is quite theoretical. I’ll also link that in the post.