This disclosure describes techniques for using deterministic key rotation in encryption to secure communication of data between clients in a server-client configuration. A unique encryption key is generated by a client for each client message without exchanging the key between clients. The server can translate a message encryption key from one client to a form usable by other clients and send the encrypted message to other clients without performing re-encryption. Described techniques reduce per-message cryptographic load on a server while maintaining communication security, integrity, and privacy.
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Turk, Ismail, "Secure Communication Using Deterministic Key Rotation Over Elliptic Curves", Technical Disclosure Commons, (December 24, 2020)