HASHING

What is Hashing?

• Hashing is the process of mapping large amount of data item to smaller table with the help of hashing function.
• Hashing is also known as Hashing Algorithm or Message Digest Function.
• It is a technique to convert a range of key values into a range of indexes of an array.
• It is used to facilitate the next level searching method when compared with the linear or binary search.
• Hashing allows to update and retrieve any data entry in a constant time O(1).
• Constant time O(1) means the operation does not depend on the size of the data.
• Hashing is used with a database to enable items to be retrieved more quickly.
• It is used in the encryption and decryption of digital signatures.