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TigerdnaTigerDNA is a package of tools created by Robinson Franklin Bruginski in 05/03/2004. It is used to make DNAs of files using the Tiger hash function.
The tools:
TigerDNA consists of two different tools. The first one, "TigerDNAmake" is used to create a .tigerdna archive (explained later). It works by dividing the file in blocks of 1Mb and hashing them with "Tiger hash function".
The second one, "TigerDNA" is used to verify the requested file for corruptions, with 1 Mb precision. It works by checking it against the .tigerdna archive.
The .tigerdna archive:
The .tigerdna archive is divide in three parts.
The first part is a "TigerDNA" 64 bit signature.
The second one is a 64 bit unsigned integer describing the size.
And finally, the last one, is a description made of 3 blocks of 64 bit for each Mb of the file.
In future versions, a complete 192 bit hash of the whole thing is to be added.
Simple Use:
tigerdnamake example.xxx (will create example.xxx.tigerdna)
tigerdna example.xxx.tigerdna
Author Note:
This tool is intended to be used in p2p systems, reducing the size of blocks to re-download in corruption cases. It uses Tiger hash because, in my personal opinion, 64 bit machines will soon be available for personal use.
Links:
TigerDNA - TigerDNA Files
TigerDNA - Slow TigerDNA Files
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