Share two secrets between two parties
126754
Two mutually untrusted parties want to exchange data: how to ensure each one gets the data it needs?
83963
Proving knowledge of a preimage of a hash without disclosing it?
36351
Having, holding, giving, and throwing parties
95742
If one uses Shadow Evocation on a willing ally can they choose not to disbelieve?
142522
Construct IND-CPA secure encryption scheme by combining two given schemes
61653
How to play with friends who don't want to read the rules?
133269
Symmetric encryption construction (meet-in-the-middle attack)
141544
Balance implications of removing unseen-attacker advantage when mutually unseen
20754
Super Secret Settings
24821
Shamir Secret sharing - Can share generator keep x values secret?
12035
XOR cipher with fixed key and known relation among plaintexts
118077
Provide indicator that another user is editing a post
20036
Can I roll for a PC in secret?
76545
changing your answer to match someone else's
100757
Secure shared memory
147120
How to exchange two arguments?
49180
If you have two envelopes, and ...