You're totally right !
If 2 people use the same key we could have a problem...

But the probability to have 2 people using the same key at the same time on the same channel should be negligeable...
(furthermore my with my implementation this would be detected by a decompression error)
In the same way the probability to generate a random packet with a valid checksum exists but is so low, that it could be ignored
(However a robust implementation could test it easily at packet generation time...)


"Only Bad Coders Code Badly In Perl" (OBC2BIP)