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'[PIC] KeeLoq PICS and RF Secure Transmission'
2007\01\30@155321 by Richard J. Pytelewski

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Has anyone gone thru the hurdles of implementing KeeLoq security in Pics?  I
am needing to RF data transfer and KeeLoq looks possible for new product
development.  Microchip requires a Confidentiality Agreement. They
apparently send you a disk with code.  Are there license fees involved? Any
experience in their ease of incorporation into programs?  Looking at their
datasheets it looks like its proprietary code that is incorporated into your
program.

Are there any other security chips I should consider.  As always, cost is an
issue.  Any help and input would be appreciated.

Rich

PSI Systems





'[PIC] KeeLoq PICS and RF Secure Transmission'
2007\02\05@134517 by alan smith
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Do you need a rolling code security arrangement?  What kind of data are you transmitting..ie...control signals or an actual data stream?

"Richard J. Pytelewski" <spam_OUTrjp_psiTakeThisOuTspamcomcast.net> wrote:  Has anyone gone thru the hurdles of implementing KeeLoq security in Pics? I
am needing to RF data transfer and KeeLoq looks possible for new product
development. Microchip requires a Confidentiality Agreement. They
apparently send you a disk with code. Are there license fees involved? Any
experience in their ease of incorporation into programs? Looking at their
datasheets it looks like its proprietary code that is incorporated into your
program.

Are there any other security chips I should consider. As always, cost is an
issue. Any help and input would be appreciated.

Rich

PSI Systems




2007\02\05@153731 by Richard J. Pytelewski

picon face
Alan:

I am using a data ... and no rolling code required.  The data will be a
single byte.

I have not received a reply from Microchip on my Keeloq application and am
starting to look at workarounds (the encoders and decoders I've found (not
many around) are costly for the application).  I'm considering using a hard
encoded value to use as a header to communicate with the receiver (my own
design as well).  Since there may be multiple transmitters (users decision),
I'm considering adding a secondary unique address (3 bit; 8 addresses) to
the transmission header and hard code the receivers to act according to the
input.  I think that'll work for this application.

This idea seem workable?  Any other encode / decode ideas?

Thanks!

Rich



{Original Message removed}

2007\02\05@161147 by Bob Axtell

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Richard J. Pytelewski wrote:
{Quote hidden}

> {Original Message removed}

2007\02\06@105950 by alan smith

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Whats your target cost?  Look at LINX....they sell the encoders/decoder chips and can create a rolling code address as well, on the fly (need to sync the rec with the tx tho).

"Richard J. Pytelewski" <.....rjp_psiKILLspamspam@spam@comcast.net> wrote:  Alan:

I am using a data ... and no rolling code required. The data will be a
single byte.

I have not received a reply from Microchip on my Keeloq application and am
starting to look at workarounds (the encoders and decoders I've found (not
many around) are costly for the application). I'm considering using a hard
encoded value to use as a header to communicate with the receiver (my own
design as well). Since there may be multiple transmitters (users decision),
I'm considering adding a secondary unique address (3 bit; 8 addresses) to
the transmission header and hard code the receivers to act according to the
input. I think that'll work for this application.

This idea seem workable? Any other encode / decode ideas?

Thanks!

Rich



{Original Message removed}

2007\02\06@125110 by Richard J. Pytelewski

picon face
Price is  a real consideration.  I looked at the MC's KeeLoq system since it
incorporated the uC with it.  The Linx encoders/decoders are about $3.50
each; $7.00 a system, which is greater than my target price for the uC +
encoder.  I'm not trying to encode really sensitive data only looking to
ensure proper system operation .... I'm really leaning toward a proprietary
software generated code and moving on.   I am still awaiting the reply from
MC, though.

Thanks for the help!

Rich

{Original Message removed}

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