When using Pretty Good Privacy (PGP) to digitally sign a message, the signature is created in a two-step process. First, the message to be signed is submitted to
PGP's cryptographic hash algorithm. What is one of the hash algorithms used by PGP for this process?
Pretty Good Privacy (PGP) uses cryptographic hash algorithms to create digital signatures, ensuring the authenticity and integrity of a message. Among the hash algorithms utilized by PGP, SHA-1 (Secure Hash Algorithm 1) is one of the commonly used options. SHA-1 generates a unique fixed-size 160-bit hash value from an input message, which forms a critical part of the digital signature process.
A) Blowfish - This is a symmetric encryption algorithm, not a hash. B) DES - This is a symmetric encryption algorithm, not a hash. C) SHA-1 - Correct. SHA-1 is a secure cryptographic hash algorithm used by PGP. D) Cast - This is a symmetric encryption algorithm, not a commonly used hash. Therefore, the correct option is C.