Subject:
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Re: RCX as a PGP engine
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Newsgroups:
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lugnet.robotics.rcx.legos
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Date:
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Sat, 23 Feb 2002 21:18:22 GMT
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Viewed:
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5131 times
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Looked at some of the source code involved. Have a look at the "Gnu
Privacy Guard" variant's source at:
http://www.pgpi.org/cgi/download.cgi?filename=gnupg-1.0.6.tar.gz
> I was just thinking, would the RCX be able to implement a PGP or RSA
> type algorithm within it's tiny memory footprint given it's processing
> power?
I don't think there is enough room for the WHOLE PGP package in the RCX,
perhaps just a single cipher, RSA key exchange and a single hash method.
Does anyone know off hand if any of these features require floating
point? You could probably substitute for an algorithm that doesn't.
Also, I doubt if our poky old RCX could generate new keys in a
reasonable amount of time, so they'd probably have to be imported.
> Imagine military grade encryption in a little yellow and grey Lego
> brick? I imagine a precompiled LegOS dll with the public and private
> keys built into it (Make sure you delete or eat the source code after
> compiling!!:) Then, you could squirt a plaintext message into
> the RCX via the IR tower which would then squirt out the encrypted
> message (all you'd need is a PC side program like Hyperterminal).
> Alternately, you could send it encrypted text and it would spit out
> the decrypted plaintext.
Wonder why no one has hacked an old Palm Pilot into being a dedicated
encryption/decryption appliance? I think these would surely
have the horsepower and memory. Take a old Palm V and us IRDA to beam
encrypted text back and forth. That would be handy.
Looks like there is a version of PGP available for the EPOC PDA's
already
http://www.zenobyte.com/pgp/index.html
> Of course you would want to cover the RCX and the IR tower up with
> something like a heavy cloth or piece of clothing to keep someone from
> evesdropping?
Same precautions needed with a PDA unless you were transmitting via a
hard wire/serial connection, but then again you'd still have to worry
about Tempest evesdropping... :)
This could be fun...
Dave
--
dcchen <at> pacbell <dot> net
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Message has 2 Replies:
 | | Re: RCX as a PGP engine
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| (...) IIRC, the algorithm doesn't need floating point ops, only very very large primes. (...) yah - I don't think the RCX will have a good generator of random numbers. cool idea, I'd be interested to see if it works :) Dan (25 years ago, 24-Feb-02, to lugnet.robotics.rcx.legos)
| | | Re: RCX as a PGP engine
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| (...) If you need floating point numbers the leJOS JVM for the RCX uses floating point: (URL) seems like a very intersting idea. I actually wanted to skip the RCX altogether and somehow link up a networking protocol using just the IR Towers. One (...) (25 years ago, 9-Mar-02, to lugnet.robotics.rcx.legos)
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Message is in Reply To:
| | RCX as a PGP engine
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| So I'm a bit behind on my reading list and I'm finally working through Steven Levy's fascinating book "Crypto" on the history and development of Public Key Incription and such. Great stuff. I was just thinking, would the RCX be able to implement a (...) (25 years ago, 23-Feb-02, to lugnet.robotics.rcx.legos)
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