CPC H04L 9/008 (2013.01) [H04L 9/085 (2013.01); H04L 9/3026 (2013.01)] | 22 Claims |
1. A processor-implemented method for modulus refresh of a ciphertext in homomorphic encryption, the method comprising:
receiving a first ciphertext corresponding to a first modulus;
generating a second ciphertext by performing a blind rotation on the first ciphertext; and
generating a target ciphertext corresponding to a second modulus greater than the first modulus based on the first ciphertext and the second ciphertext.
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