Protocols for secretive value matching?

submitted by comfy to programming 10 points | 0 comments I couldn’t sleep last night so there’s got to be a better title Alice and Bob (and maybe even Charlie!) want to find common preferences. However, they’re each ashamed of some of their preferences. Each are only comfortable with another knowing a preference of theirs if that preference is shared by everyone at the table. They also don’t want gossipy Mallory to run a third-party check for them - this has to be possible without trusting anyone or any program with access to the secret data of others. Assume Alice and Bob may be tempted to tr

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