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.
Question
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.
Solution
The statement that best encapsulates the basic principles of a cryptographic hash function is: "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."
This is because a cryptographic hash function is designed to take an input (or 'message') and return a fixed-size string of bytes, typically a digest that is unique to each unique input. It is 'one-way' in the sense that it is computationally impractical to generate the original input given only the hash output. Lastly, even a small change in input should produce such a drastic change in output that the new hash output appears uncorrelated with the old hash output, a property known as the 'avalanche effect'.
Similar Questions
What is a hash function?Group of answer choicesA function that maps keys to their memory addresses.A function that maps keys to unique integer values.A function that maps keys to random integer values.A function that maps keys to a fixed range of integer values.
Of the following, which statement correctly describes the difference between a secure cipherand a secure hash?A hash produces a variable output for any input size; a cipher does not.A cipher produces the same size output for any input size; a hash does not.A hash can be reversed; a cipher cannot.A cipher can be reversed; a hash cannot.
Which of the following is an advantage of using a hash function for message authentication?OptionsThe hash function can be used to generate a random messageThe hash function can be used to verify that the message has not been tampered withThe hash function can be used to encrypt the messageThe hash function can be used to compress the message
Question27Max. score: 2.00Of the following, which statement correctly describes the difference between a secure cipherand a secure hash?A hash produces a variable output for any input size; a cipher does not.A cipher produces the same size output for any input size; a hash does not.A hash can be reversed; a cipher cannot.A cipher can be reversed; a hash cannot.
What is the primary purpose of a hash function in data structures?Group of answer choicesTo generate a unique key for a given inputTo reduce the size of dataTo divide data into fixed-size blocksTo sort the data
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