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. 2022 Oct 18;24(10):1489. doi: 10.3390/e24101489
Algorithm 2 IND-CPA PKE Decryption (simple ver.)
Input private key sk; ciphertext c = (c1||c2)
Output message m
  1: u = Encode(c1), v = Encode(c2)
  2: sk^ = Encode(sk)
  3: m′ = Decode(v − (sk^ × u))
  4: return m