Keyring definitions

Keyring

1) Double loop device 2) Thumb-drive holder 3) What may hold loyalty cards
Found on https://www.crosswordclues.com/clue/keyring

---

Keyring

[cryptography] In cryptography, a keyring stores known encryption keys (and, in some cases, passwords). For example, GNU Privacy Guard makes use of keyrings. ...
Found on http://en.wikipedia.org/wiki/Keyring_(cryptography)

---