Table of Contents

RIPEMD-160 Test Vectors

Overview

RIPEMD-160 is a 160-bit cryptographic hash function designed by Hans Dobbertin, Antoon Bosselaers, and Bart Preneel. It is widely used in cryptocurrency systems, particularly Bitcoin for address generation.

Specification

  • Output Size: 160 bits (20 bytes)
  • Block Size: 512 bits (64 bytes)
  • Rounds: 80 (5 groups of 16)
  • Word Size: 32 bits

Official Reference

Test Vectors

Vector 1: Empty string

Input:  "" (empty)
Length: 0 bytes
Output: 9c1185a5c5e9fc54612808977ee8f548b2258d31

Vector 2: Single character "a"

Input:  "a"
Length: 1 byte
Hex:    61
Output: 0bdc9d2d256b3ee9daae347be6f4dc835a467ffe

Vector 3: "abc"

Input:  "abc"
Length: 3 bytes
Hex:    616263
Output: 8eb208f7e05d987a9b044a8e98c6b087f15a0bfc

Vector 4: "message digest"

Input:  "message digest"
Length: 14 bytes
Hex:    6d65737361676520646967657374
Output: 5d0689ef49d2fae572b881b123a85ffa21595f36

Vector 5: Lowercase alphabet

Input:  "abcdefghijklmnopqrstuvwxyz"
Length: 26 bytes
Output: f71c27109c692c1b56bbdceb5b9d2865b3708dbc

Vector 6: Alphanumeric

Input:  "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq"
Length: 56 bytes
Output: 12a053384a9c0c88e405a06c27dcf49ada62eb2b

Vector 7: Full alphanumeric

Input:  "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"
Length: 62 bytes
Output: b0e20b6e3116640286ed3a87a5713079b21f5189

Vector 8: Repeated digits

Input:  "12345678901234567890123456789012345678901234567890123456789012345678901234567890"
Length: 80 bytes
Output: 9b752e45573d4b39f4dbd3323cab82bf63326bfb

Vector 9: Million "a" characters

Input:  "a" repeated 1,000,000 times
Length: 1,000,000 bytes
Output: 52783243c1697bdbe16d37f97f68f08325dc1528

Bitcoin Usage

In Bitcoin, addresses are generated using:

address = Base58Check(version || RIPEMD-160(SHA-256(public_key)))

This is often called "Hash160" in cryptocurrency contexts.

Implementation Notes

  • Uses Merkle-Damgård construction
  • Two parallel lines of computation (left and right)
  • Five boolean functions, one per round group
  • Little-endian byte order
Edit this page