Which of the following cryptography algorithms will produce a fixed-length, irreversible output?
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A. B. C. D.D.
The correct answer is D. MD5.
MD5 (Message Digest 5) is a hashing algorithm that produces a fixed-length, irreversible output known as a hash value. The hash value is a fixed-size representation of the original message, regardless of the input's size. MD5 generates a 128-bit hash value, which is a sequence of 32 hexadecimal characters.
Hashing algorithms are commonly used in cryptography to protect data integrity by verifying that the message has not been tampered with during transmission or storage. A message's hash value is calculated before transmission and is compared to the hash value calculated after the message is received. If the two values match, it is highly likely that the message has not been altered.
AES (Advanced Encryption Standard) is a symmetric encryption algorithm that produces a variable-length output based on the length of the input key. AES is used for encrypting and decrypting data, not for generating fixed-length hash values.
3DES (Triple Data Encryption Standard) is also a symmetric encryption algorithm that produces a variable-length output based on the length of the input key. Like AES, 3DES is used for encrypting and decrypting data, not for generating fixed-length hash values.
RSA (Rivest-Shamir-Adleman) is a public-key encryption algorithm that uses a pair of keys - a public key for encryption and a private key for decryption. RSA is not used for generating fixed-length hash values.
In summary, the hashing algorithm that will produce a fixed-length, irreversible output is MD5.