In public key encryption for authentication, the verifier decrypts the ciphertext with the supplicant's public key.

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In public key encryption for authentication, the verifier uses the supplicant's public key to verify the signature, not to decrypt the ciphertext. The signature is created using the supplicant's private key, and the public key is used to verify that the signature is valid, ensuring the message's integrity and authenticity.

In Public Key Encryption for Authentication, the Verifier Decrypts the Ciphertext