Awesome SHA256

A collection about the most awesome crypto (one-way) hash function / digest / fingerprint - Secure Hash Algorithm 256-Bit (SHA256)

Trivia Quiz: What's SHA256?

• (A) Still Hacking Anyway
• (B) Secure Hash Algorithm
• (C) Sweet Home Austria
• (D) Super High Aperture

A: SHA256 == Secure Hash Algorithm 256-Bit

SHA256 is a (secure) hashing algorithm designed by the National Security Agency (NSA) of the United States of America (USA).

Find out more @ Secure Hash Algorithms (SHA) @ Wikipedia.

A (secure) hash is also known as:

• Digital (Crypto) Fingerprint == (Secure) Hash
• Digital (Crypto) Digest == (Secure) Hash
• Digital (Crypto) Checksum == (Secure) Hash

Hello, Cryptos!

Print the SHA256 hash digest as a 64 hex string for "Hello, Cryptos!"

Note: 1 hex char is 4-bits, 2 hex chars are 4x2=8 bits and 64 hex chars are 4x64=256 bits.

Hexa(decimal) chart:

binary	hex (2^4=16)	decimal	binary	hex (2^4=16)	decimal
0000	0	0	1000	8	8
0001	1	1	1001	9	9
0010	2	2	1010	a	10
0011	3	3	1011	b	11
0100	4	4	1100	c	12
0101	5	5	1101	d	13
0110	6	6	1110	e	14
0111	7	7	1111	f	15

Ruby

require "digest"

p Digest::SHA256.hexdigest( "Hello, Cryptos!" )
# => 33eedea60b0662c66c289ceba71863a864cf84b00e10002ca1069bf58f9362d

Go

package main

import(
  "fmt"
  "crypto/sha256"
)

func main() {
  fmt.Printf( "%x\n", sha256.Sum256( []byte( "Hello, Cryptos!" )))
  // => 33eedea60b0662c66c289ceba71863a864cf84b00e10002ca1069bf58f9362d5
}