# HAS-160

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**HAS-160** is a cryptographic hash function designed for use with the Korean KCDSA digital signature algorithm. It is derived from SHA-1, with assorted changes intended to increase its security. It produces a 160-bit output.

HAS-160 is used in the same way as SHA-1. First it divides input in blocks of 512 bits each and pads the final block. A digest function updates the intermediate hash value by processing the input blocks in turn.

The message digest algorithm consists of 80 rounds.

## External links[edit]

- A description of HAS-160, and some test vectors.
- RHash, an open source command-line tool capable of calculating HAS-160.

## Source[edit]

## See Also on BitcoinWiki[edit]