@fasterthanlime That depends on who exactly the aforementioned lord is.

If it is Mr. J. Christ (Gregorian calendar), then what the others have said.

If it is his father, who denies having a son (Hebrew calendar, 1736 BC), then you could use an abacus.

If it is the same father, but under a different name (Hijri calendar, 2585 AC), then any quantum computer in the household can deal with it.

If our lord is the Japanese emperor (Reiwa eras, exact date unknown, but the emperor must be 2024 years old, so probably around 40K AC), you can ask Adeptus Mechanicus, and pray to the Machine God there's no heresy found in those files.

Or in any of those cases, you can ask the lord directly, most of them tend to be all-knowing, so for sure they know the password.