Kensington Security Slot
![Rightmost opening on the side of this PowerBook G4 laptop computer is a Kensington Security Slot](/Images/godic/202501/22/Kensington-lock-slot1104.jpg")
![A security cable attached to a Kensington Security Slot on the side of a laptop computer](/Images/godic/202501/22/Kensington-lock-connected1104.jpg")
A Kensington Security Slot (also called a K-Slot or Kensington lock) is part of an anti-theft system designed and patented by Kryptonite in 1999-2000, assigned to Schlage in 2002, and since 2005 owned and marketed by Kensington Computer Products Group, a division of ACCO Brands.