[thelist] cryptic question

[.redstar.]

Further to Bret's answer, I would say what Eduardo needs is to really
increase the event space so as to make it hard for a brute force attack.
Bret's advice is good but it wouldn't take long to guess what is being done
just by doing a simple pattern matching on a couple of samples.
A better approach would be to start by storing an MD5 hash of the price in
the database. This could be possibly salted just to make things harder to
guess.

.redstar.