Twofish Source Code
- Reference C Implementation (Updated 6/20/2011)
- Optimized C Implementation
- Pentium/Pro/II Assembly
- 6805 Assembly
- Z80 Assembly
- Delphi (part of DCPcrypt)
- Java (part of Cryptix)
- Optimized C (two versions by Drew Csillag)
- Perl (several versions)
- Visual Basic (by Jesper Soederberg)
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