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What are the applications of Cryptographic hash function?
There are several applications of cryptographic hash function are as follows −
Digital Signature − Hand-written signature is a method to prove that a paper file is signed by us and not by someone else. It can prove this and the current hand-written signature is compared with one or more of the earlier handwritten signatures.
If there is a match then the recipient of the files can securely accept that the files could not have been endorsed by someone else. In case it is the first time, it can have to prove the identity by means of some recognition card, and necessarily by being physically present to sign the files.
File Integrity Verification − Hash functions are broadly used to check file integrity. Once downloaded free application on the Internet, have possibly visited websites which publish the checksum of the software near the hyper-connection of the binary implementation file or the archived source program of the corresponding software.
Without this important element of information which is the checksum of the software, one will have a tough time checking the integrity of downloaded software.
Password Hashing − A password is a secret series of character that one uses to gain access to a document, an application or a computer system.
Password has been used long before the time. It can be used to be a private word or phrase which allowed a person to be accepted as a friend by soldiers posted to carry watch and guard.
Key Derivation − Key derivation is the procedure of deriving several keys from a shared secret password or passphrase (which generally does not have the desired features to be used directly as cryptographic keys) to secure a connection session.
For instance, there are two person can agree on a secret key and pass that key to a key derivation function to make keys from encryption and authentication. This provides that an attacker who learns the authentication key will not have access to the encryption key.
Trusted Digital Time Stamping − It is desirable to bind a time with a record as to certify its existence at that specific time. In the signify of intellectual property where dispute can increase between two or more person about who was the first one to create a discovery or an invention, time-stamping can play an essential role at deciding who is right.
Rootkit Detection − A Root kit is a program or a pair of programs that a hacker set up on the victim’s computer in order to cover the tracks of different malicious programs which attempt to corrupt an operating framework.
A Rootkit will cover its presence on a negotiate system. Root kits can be identified in several methods such as signature-based discovery which needs scanning tools much like antivirus or antispyware programs that scan the system for signs of formerly known rootkits patterns.
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