These are two sample names of keys:
Key nº 2816371
Key nº 2802409
Not very easy to remember, aren't they. If you need to know which one is which one and you don't carry around a dangerous key id's list, then you are out of luck.
My suggestion is to translate on the fly the last four numbers to letters. Lets say we got these two sets. A and K are zero:
ABCDEFGHIJ
KLMNOPQRST
To display the last four digits, the code picks a letter from one, then a letter from the other, and the examples would look like:
Key 281GNHL
Key 280CNAT
I know there are papers listing key numbers, but it doesn't need a degree of cryptography to translate back from the new names.
, I wouldn't object to it happening.
It would be kinda cool if a key might fit in several locks, since in regular keys there isn't an infinite amount of options (although there are many). If people could set the number themselves, they could use something easy to remember like 123456 or 616616 but there would be a higher chance of someone else coming up with the same number. And there would be no way of stopping people from keeping off-character key lists which means when their rich character dies and their newspawn happens to spawn at the neighbouring town, they could easily acquire a little bit of iron with a day of work, loan a file to make a key and go randomly test it on the neighbouring town's storage.
