The-Crucial-Role-of-Salt-in-Password-Hashing When we create account in Gmail, Facebook or any other application (especially web-application), we set credentials (username and password). Steps are as follow 1. When we set password (like qwert123 ) for the first time, a secure application turns this plaintext password into a fixed-length, irreversible string set and stores in the database along with username (generally in hexadecimal number: 824a67f29e97b8798a9df7f00189f3e1 ). 2. After creating account, when we put username and password to login, the application turns our plaintext password into hash again. 3. Compares with previously stored hash and finally grant or reject access depending on whether there is a match or not. An application cannot reverse this hash ( 824a67f29e97b8798a9df7f00189f3e1) to plaintext ( qwert123 ), it just compares two has...