When testing the use of the table PK as a seed, padded with '0's the encrypted string is different but very similar. Because most of the characters in seed are the same. For example, for PK 5 and PK 6. It would still make it very difficult to crack.
I added another "twist" to this approach.
Instead of using the PK as a seed, I use the PK*369 (or any other number that I won't share with anybody :)).
The resulting number/seed then has more different characters than simply PK.
Example:
5*369=1845 - Seed "1845"
6*369=2214 - Seed "2214"
This way the Seed is even more difficult to guess, even if someone has the cipher() code.
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