[tahoe-dev] Storing a small file leads to a weird read capability

Francois Deppierraz francois at ctrlaltdel.ch
Wed Apr 7 05:09:14 PDT 2010


Hi folks,

Storing a 32 bytes file which contains '17' followed by 30 zeros leads 
to the following read capability:

URI:LIT:ge3qaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa

Here's the file content in hex.

0000000 3731 0000 0000 0000 0000 0000 0000 0000
0000010 0000 0000 0000 0000 0000 0000 0000 0000
0000020

It looks weird to me to see a cryptographically-secure identifier which 
doesn't look random enough. Wouldn't such feature lead to potential attacks?

François


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