Encryption with Weakly Random Keys Using Quantum Ciphertext
Encryption with Weakly Random Keys Using Quantum Ciphertext
The lack of perfect randomness can cause significant problems in securing communication between two parties. McInnes and Pinkas proved that unconditionally secure encryption is impossible when the key is sampled from a weak random source. The adversary can always gain some information about the plaintext, regardless of the cryptosystem design. …