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Tiger

Tiger is a 192-bit hash function designed by Ross Anderson and Eli Biham, optimized for 64-bit platforms, used in TTH (Tiger Tree Hash).

Purpose

Provides fast hashing on 64-bit platforms, used for integrity verification in P2P file sharing.

Mechanism

Based on Merkle-Damgård, using 3 S-boxes and 64-bit word arithmetic, 24 rounds. The state is three 64-bit words (192 bits total). Optimized for 64-bit ALUs; performance drops on 32-bit platforms.

Use cases

  • Direct Connect P2P TTH
  • eDonkey file hashing
  • Some file system checksums
  • Cryptographic research

Examples

  • Input 
    hello
    Output 
    3b3a3a3a3a3a3a3a...

    192-bit output

Common errors

Using Tiger in new systems (not a NIST standard)
Use SHA-256 or BLAKE2

Related terms

RIPEMD
RIPEMD is a 160-bit hash function designed by Hans Dobbertin et al., an output of the European RIPE project; Bitcoin addresses use RIPEMD-160.
GLOSSARY
SHA-256
SHA-256 is the 256-bit-output member of the SHA-2 family, widely used in TLS, blockchains, and cryptographic applications, with no known practical attacks.
GLOSSARY
MD5
MD5 is a 128-bit cryptographic hash function designed by Ronald Rivest; proven insecure by collision attacks, it is now used only for non-security purposes such as checksums.
GLOSSARY

Related tools

Hash Calculator
Compute MD5, SHA-1, SHA-256, or SHA-512 hashes with hex or Base64 output. Free, private, and 100% client-side.
TOOL

References