Two quantum protocols for secure blind decryption with two users preserve message and key secrecy, with the second also hiding the key index and remaining secure against post-protocol server collusion where the classical version fails.
Capacity of Quantum Pri- vate Information Retrieval With Multiple Servers,
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Quantum secure blind decryption with two users
Two quantum protocols for secure blind decryption with two users preserve message and key secrecy, with the second also hiding the key index and remaining secure against post-protocol server collusion where the classical version fails.