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KeeLoq is a proprietary hardware-dedicated block cipher that uses a non-linear feedback shift register (NLFSR). The uni-directional command transfer protocol was designed by Frederick Bruwer of Nanoteq (Pty) Ltd., the cryptographic algorithm was created by Gideon Kuhn at the University of Pretoria, and the silicon implementation was by Willem Smit at Nanoteq Pty Ltd (South Africa) in the mid-1980s. KeeLoq was sold to Microchip Technology Inc in 1995 for $10 million.[1] It is used in "code hopping" encoders and decoders such as NTQ105/106/115/125D/129D, HCS101/2XX/3XX/4XX/5XX and MCS31X2. KeeLoq is or was used in many remote keyless entry systems by such companies as Chrysler, Daewoo, Fiat, GM, Honda, Toyota, Volvo, Volkswagen Group, Clifford, Shurlok, and Jaguar.[2]
^US patent 5517187, Bruwer, Frederick J.; Smit, Willem & Kuhn, Gideon J., "Microchips and remote control devices comprising same", issued 1996-05-14, assigned to Microchip Technology Inc
^Some evidence that Chrysler indeed uses KeeLoq can be found in (this video).
KeeLoq is a proprietary hardware-dedicated block cipher that uses a non-linear feedback shift register (NLFSR). The uni-directional command transfer protocol...
2011, Microchip Technology shipped the 10 billionth PIC microcontroller. KeeLoq technology enhances security in wireless and remote controlled systems through...
and gate remote control and receivers. The chip uses the KeeLoq algorithm. The HCS301 KeeLoq system transmits 66 data bits: 34 bits are not encrypted:...
Nathan; Preneel, Bart (2008), How To Steal Cars – A Practical Attack on KeeLoq, Eurocrypt 2008 Bono, Stephen C.; Green, Matthew; Stubblefield, Adam; Juels...
rather than the mechanical keyswitch. A number of these systems, such as KeeLoq and Megamos Crypto have been demonstrated to be weak and vulnerable to cryptanalytic...
of Courtois include algebraic attacks on stream ciphers, attacks on the KeeLoq and Hitag 2 systems used for remote keyless automobile entry systems, and...
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