A bugle with keys that allow different notes to be played.

plural of key-bugle

(US) Indicates that the speaker has lost his or her keys.

(UK) Indicates that the speaker has lost his or her keys.

The subfield of cryptography in which all information used to encode a message is assumed to be publicly available.

A form of cryptography which allows users to communicate securely without previously agreeing on a shared secret key (abbreviation PKC)

(idiomatic) A child who returns home from school to an empty house and therefore must unlock/unlatch the exterior door with a key, especially a child of working or absent parent(s).

(computing) A certificate that uses a digital signature to bind together a public key with an identity — used to verify that a public key belongs to an individual.

(computing) A function key whose function can be assigned by the user or by a program.

(computing, Internet) A value that is used to identify a key set.