What is SHA1?
In cryptography, SHA-1 (Secure Hash Algorithm 1) is a cryptographic hash function designed by the United States National Security Agency and is a U.S. Federal Information Processing Standard published by the United States NIST.
SHA-1 produces a 160-bit (20-byte) hash value known as a message digest. A SHA-1 hash value is typically rendered as a hexadecimal number, 40 digits long.
You can here try our SHA1 Online Encryption Tool
PHP SHA1 example of use
$str = "Hello"; echo "The string: ".$str; echo "TRUE - Raw 20 character binary format: ".sha1($str, TRUE); echo "FALSE - 40 character hex number: ".sha1($str);