Patent
Secure self learning system
Frederick Johannes Bruwer
- 25 Aug 1995
120
TL;DR: In this paper, a method and system for the remote control of devices having a secure self-learn capability is presented, which includes an encoder and a decoder, the encoder encoding variable information including a user key using a non-linear algorithm to produce an encoded value transmitted to the decoder.
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Abstract: A method and system for the remote control of devices having a secure self learn capability. The system includes an encoder and a decoder, the encoder encoding variable information including a user key using a non-linear algorithm to produce an encoded value transmitted to the decoder, the decoder decoding the value using the same algorithm. In a learning mode a new encoder is to be added to the system. The new encoder produces an encoded value using a key generation seed. The decoder, upon receiving the encoded key generation seed, produces a decoding key based upon the decoded key generation seed. The decoding key is stored in the decoder memory allowing valid recognition of the new encoder in a secure manner.
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Citations
Patent
System and method for training a transmitter to control a remote control system
Steven L. Geerlings,Loren D. Vredevoogd,David A. Blaker,John D. Spencer +3 more
- 20 May 2004
TL;DR: In this article, a method for training a trainable RF transmitter to transmit variable code signals used to actuate a remote device having a receiver where the transmitter includes a memory that has stored variable code characteristics for a plurality of different remote devices is proposed.
48
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Bradford L. Farris,James J Fitzgibbon,Paul E Wanis +2 more
- 19 Feb 1997
TL;DR: In this paper, the controller of a commonly controlled gate receives and contemporaneously analyzes codes in accordance with a plurality of different code format standards and at the same time analyzes the received code to determine which format is actually being received.
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Mark D. Chuey
- 30 Jul 2003
TL;DR: In this paper, a universal remote control is provided for each channel supported, and a mode is initially established as rolling mode, and at least one activation signal is transmitted based on a fixed code transmission scheme and including a reversal or an inverse of the stored fixed code.
45
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David A. Blaker
- 07 Nov 2003
TL;DR: In this paper, a trainable transceiver is configured to receive a characteristic of an activation signal, store the characteristic of the activation signal in memory and to retransmit the characteristic.
44
Patent
System and method for protecting data files by periodically refreshing a decryption key
Xin Wang
- 21 Dec 1999
TL;DR: In this article, the authors proposed a method for transferring among key holders in encoding and cryptographic systems the right to decode and decrypt messages in a way that does not explicitly reveal decoding and decrypting keys used and the original messages.
43
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