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

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.

plural of public key certificate

plural of Key lime pie

An American dessert made of Key lime juice, egg yolks, and sweetened condensed milk in a pie crust, often with a meringue topping.

plural of key performance indicator

(historical) A charm in the form of a metal nail, cross, or cone, used to brand dogs or cauterize wounds in an attempt to prevent or cure rabies.

To never release someone (e.g., from prison).