Scambling the source alphabet should have an effect similar to a monoalphabetic substitution cypher. This is not strong cryptography. If the attacker has any ab

Scambling the source alphabet should have an effect similar to a monoalphabetic substitution cypher. This is not strong cryptography. If the attacker has any ability to generate IDs quickly, like by creating user accounts or other resources they can create many IDs with known ordering. Likely effective against non-serious attempts.