鍵

key

public key

shared key

internal lock

Public Key Infrastructure

lock pick

section of road that is curved on purpose as a defensive measure

latchkey child

key success factor

key management

public key encryption

duplicate key

symmetric key cryptography

public key cryptosystem

shared key encryption

encryption key

keystroke

symmetric key cryptography

lock-opening

key distribution

to have the game in one's hands

locking doors

relay key

telegraph key (switching device used to send Morse code)

white key (on a piano, organ, etc.)

keyboard instrument

symmetric key cryptography

key-shaped

secret key cryptosystem

cryptographic key

asymmetric key cryptography

private key (cryptography)

locksmith

secret key cryptography

black key (on a piano, organ, etc.)

private account (on social media, esp. Twitter)

bunch of keys

key ring

hidden mysteries

key bed

to have a narrow view of things

melodica

to hold the key (to)

keyhole

keyboard (of a piano, typewriter, etc.)

to lock (a door, etc.)

to become locked

key rack

private account (on social media, esp. Twitter)