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What is Decrypting the Affine Cipher about?

The document discusses decryption of messages encrypted with an affine cipher. It explains that to decrypt, we apply the encrypting congruence and solve for p, the plaintext letter. We subtract b from both sides, multiply both sides by the inverse of a modulo 26, and determine that p is congruent to the inverse of a multiplied by c minus b, modulo 26. This recovers the plaintext letter p.

Author

Harshitha Devi

Language

EN