Reduce collision prob for link shortener

Boldewyn / bookmarks

A private bookmarking tool with a social touch.

http://boldewyn.github.com/bookmarks/

GNU General Public License v3.0

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Open Boldewyn opened 13 years ago

Boldewyn commented 13 years ago

CRC32 has a too large possibility for collisions.

We could use pack(index) . substring(crc32(url)), which is still acceptably random enough to not be guessed.