Explain cryptographic hash. describe its properties
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Cryptography Hash functions
Hash functions are extremely useful and appear in almost all information security applications.
A hash function is a mathematical function that converts a numerical input value into another compressed numerical value. The input to the hash function is of arbitrary length but output is always of fixed length.
Values returned by a hash function are called message digest or simply hash values . The following picture illustrated hash function −
The typical features of hash functions are −
Fixed Length Output (Hash Value)
Hash function coverts data of arbitrary length to a fixed length. This process is often referred to as hashing the data .
In general, the hash is much smaller than the input data, hence hash functions are sometimes called
compression functions .
Since a hash is a smaller representation of a larger data, it is also referred to as a digest .
Hash function with n bit output is referred to as an n-bit hash function . Popular hash functions generate values between 160
Hash functions are extremely useful and appear in almost all information security applications.
A hash function is a mathematical function that converts a numerical input value into another compressed numerical value. The input to the hash function is of arbitrary length but output is always of fixed length.
Values returned by a hash function are called message digest or simply hash values . The following picture illustrated hash function −
The typical features of hash functions are −
Fixed Length Output (Hash Value)
Hash function coverts data of arbitrary length to a fixed length. This process is often referred to as hashing the data .
In general, the hash is much smaller than the input data, hence hash functions are sometimes called
compression functions .
Since a hash is a smaller representation of a larger data, it is also referred to as a digest .
Hash function with n bit output is referred to as an n-bit hash function . Popular hash functions generate values between 160
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