/[gzz]/manuscripts/Sigs/internal.rst
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revision 1.3 by tjl, Mon May 19 15:40:31 2003 UTC revision 1.4 by tjl, Mon May 19 16:49:56 2003 UTC
# Line 554  Tradeoffs in deterministic key boosting Line 554  Tradeoffs in deterministic key boosting
554      `$t=175$`, `$k=62$`      `$t=175$`, `$k=62$`
555    
556    
557    - Security not straightforward:
558      There is a large number of hashes used, and a collision
559      between any two could allow forging of signatures.
560      birthday attacks, ...
561    
562      - Bleichenbacher-Maurer.
563        To sign 160 bits, we need `$n=29$`.
564        Signatures are 90 hashes
565    
566    Supporting multiple signatures is possible e.g. in BiBa,
567    but inefficient. Merkle hash trees better
568    
569  Conclusion  Conclusion
570  ==========  ==========
571    

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