A checksum is a value used to verify the integrity of a file or a data transfer. In other words, it is a sum that checks the integrity of data/file; this assures the receiver that the files/data has not been compromised.

Features of Checksum Validation:

• To verify that the content in the file is of integral nature
• To confirm that the file has neither been altered by unauthorized third party, nor been damaged during the transfer process across the internet
• To act as signature of the file