1) as more IDs are generated, the probability of collision increases
2) a non integer primary key is slow
For a single database instance, it's far more performant to leave it as an autoincrementing integer and when it needs to be exposed, encrypt it in the backend before sending it out. Why not hashids.org? It's insecure: https://carnage.github.io/2015/08/cryptanalysis-of-hashids
The issues with this are
1) as more IDs are generated, the probability of collision increases
2) a non integer primary key is slow
For a single database instance, it's far more performant to leave it as an autoincrementing integer and when it needs to be exposed, encrypt it in the backend before sending it out. Why not hashids.org? It's insecure: https://carnage.github.io/2015/08/cryptanalysis-of-hashids