## sha256 encryption

## What is sha256 encryption?

SHA256 literally means that for messages of any length, SHA256 will generate a 256-bit hash value called a message digest. This summary is equivalent to an array with a length of 32 bytes, with a total of 256 bits. It is usually represented by a hexadecimal string with a length of 64, where 1 byte =8 bits, and the length of a hexadecimal character is 4 bits.

## What is the difference between sha1, sha256, sha384, and sha512?

The differences between sha1, sha256, sha384, and sha512 lie in the encryption algorithm, the length of the encrypted ciphertext and the difficulty of cracking. Relatively speaking, the encryption security of sha256 is already quite high.

## Detailed description of the principle of the SHA256 algorithm?

In order to better understand the principle of SHA256, we first introduce the modules that can be extracted separately from the algorithm, including initialization of constants, information preprocessing, and logical operations used. After overcoming these obstacles in understanding, we will explore the main part of the SHA256 algorithm, that is, how message summaries are calculated.