Quick Checksum Verifier - checksum

If your work is related to the shipment or the placement of information on the result of which depends on the integrity, then for sure you are using the comparison checksum of data sent and received files. You may be useful free utility is a portable Quick Checksum Verifier, which can not only check the checksum, but also generate it.

The checksum is generated by algorithms MD5 and SHA-1.

MD5 (Eng. Message Digest 5) - 128-bit hash algorithm developed by Professor Ronald L. Rivest of MIT (Massachusetts Institute of Technlogy, MIT) in 1991.

This algorithm is designed to create a special "digest" the length of the messages. Compare "digest" messages and called "verification hash» (hashcheck). Knowing the value obtained MD5b impossible to restore a file, but you can say with certainty whether the files have changed during transmission.

Secure Hash Algorithm 1 - cryptographic hash algorithm. For an input message of arbitrary length (maximum 2⁶⁴ - 1 bit), the algorithm generates a 160-bit hash value, also called a message digest.

SHA-1 is used in a variety of cryptographic applications. This algorithm is recommended as a basic for use in US government agencies. It works on the same principles, on what works and MD5. Big difference in algorithms for the end user is not present, but most of all common MD5 - and his advice is always to use to verify the integrity of files.

Download Quick Checksum Verifier: http://www.softpedia.com/get/PORTABLE-SOFTWARE/Security/Encrypting/Quick-Checksum-Verifier.shtml.