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For question borderline with, or having application to, computer science. Consider also posting http://cs.stackexchange.com/ or http://cstheory.stackexchange.com/ instead of here, if appropriate.

3 votes

Securing privacy of "who communicates with whom" under Orwell-like conditions

If Alice encrypts a a lot of messages with Bob's RSA public key, after a while they can be identified as being directed to Bob, since the encrypted value is a number from the multiplicative group $\ma …
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