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A lock and key is a pair of devices used to secure an object or location from unauthorized access.

Lock and Key or Lock & Key may also refer to:

Arts, entertainment, and media

Film

• Taala Te Kunjee (Lock and Key), a 2017 Indian Punjabi-language film

Literature

• Lock and Key (novel), a 2008 novel by Sarah Dessen
• Lock and Key, a book series by Ridley Pearson

Music

Albums and EPs

• Lock & Key (album), a 2014 album by Cruel Hand
• Lock & Key, an EP by Wild Adriatic

Songs

• "Lock and Key" (Klymaxx song)
• "Lock and Key" (Rush song)
• "Lock and Key", a song by Nina Sky
• "Lock and Key", song by SNAFU from the album Situation Normal

Science

• Lock and key model, a model for the specificity of enzymes and other of biomolecules
• Memory protection, a computer memory protection technique

See also

• Lock (disambiguation)
• Locke & Key (disambiguation)