Research Article
Close to Optimally Secure Variants of GCM
Algorithm 6
The decryption algorithm of OGCM-2.
Input: three keys , a nonce , an associated data , a ciphertext , and a tag | Output: a plaintext or | | | | | If , then | Partition into , | for and | for to | | | for to | | | | return | else return . |
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