Which codes must be viewed as the hash functions that have two functionally distinct inputs, that is, a secret key and a message and produces a fixed size of the output?AMessage Authentication codesBMessage codesCAuthentication CodesDNone of the above.

Explain different hashing functions with an example.

What is a feature of a cryptographic hash function?Question 19Select one:The output has a variable length.The hash input can be calculated given the output value.The hash function is a one-way mathematical function.Hashing requires a public and a private key.

huffmann codes areSelect one:a. uniquely decodableb. lossless source coding techniquec. all of themd. variable length codes

Which of the following statements best encapsulates the basic principles of a cryptographic hash function?Group of answer choicesA cryptographic hash function generates a unique identifier for each unique input, can produce output of varying lengths based on the complexity of the input, and maintains a consistent hash value for similar inputs to ensure easy retrieval.A cryptographic hash function is reversible, meaning that with enough computing power, the original input can be retrieved from its hash, and it produces the same hash for any given input of similar size.A cryptographic hash function can easily convert the hash value back to its original input, always produces variable-sized output depending on the length of the input, and a small change in the input results in a minor change in the output hash.A cryptographic hash function is a one-way function that cannot easily be reversed, always produces a fixed-size output regardless of the input size, and a small change in the input results in a drastically different output hash.

_______ codes are emphasized in selective coding.