imza is signature while şifre is password. I imagine the conflation occurred because signatures are used like passwords for authentication...
Likewise, the monogram of the sitting english monarch (as seen on postboxes and so forth) is the "Royal Cypher".
https://en.wikipedia.org/wiki/Royal_cypher
Likewise, the monogram of the sitting english monarch (as seen on postboxes and so forth) is the "Royal Cypher".
https://en.wikipedia.org/wiki/Royal_cypher