passkey

noun4

1. •
   A key for entering a house or other building.

   • Now, Balmy, here's the passkey to that house. The windows are wired, but the front door isn't. Get inside that door as quietly as you can, and find out as much as you can. — 1917
2. •
   A cryptographic key that is tied to specific devices or cloud accounts and is meant to be used instead of a password.

   • Google is starting to nudge users to try out passkeys, a replacement for traditional passwords that can stop phishing attacks and make sign-ins easier. — 2023
3. •
   Synonym of password.

   • The router then generates a random numeric passkey and delivers it to the user […] — 2007
4. •
   A key, especially in a hotel, that allows someone in authority to open any door.

   • With the universal pass-key of imagination we open the dingy door, pass down a dark passage and up a narrow stair. — 1925