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Re: faster code for neural network
by rarachel＠prism.poly.edu 17 Dec '03

17 Dec '03

> Recently I received the code for a neural network. It is written in > standard ANSI-C. However, running it on the Mac gives me a lot of coffee > breaks ( it takes 10 min on a IIci, 3 hrs on an LC ). I was wondering if > anybody out there has experience with this and knows of ways to make the > code faster ( replacing ANSI routines with Mac-based routines. > > If you are the woman or man with this experience mail me! I really need the > help ( it's all for my master's thesis ). You might want to get a match coprocessor for the LC. The ci has one, and that's probably your problem. (I'm not sure if the LC can take one, though!) If my memory still works after the two pints I just had, the LC has a 68020 without any FPU. You might want to upgrade to an LC III and find out if it has an FPU. I believe neural nets use floats, no? If so you will most certainly need and FPU if you want decent speed.

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Answers to newbie PGP questions. Listen up!
by an48138＠anon.penet.fi 17 Dec '03

17 Dec '03

If you anarchy boys get some dummies asking, "Hey, how do I PGP?", give them my e-mail address, or better, point them to alt.security.pgp where I and Gary Edstrom have been posting the "Here's How to MacPGP!" and "PGP FAQ" guides. My MacPGP Guide will be of interest even to seasoned MacPGP users. I will mail it to anyone, but first look on alt.security.pgp. Get these and upload them EVERYWHERE. Thank-you. -Xenon ------------------------------------------------------------------------- To find out more about the anon service, send mail to help(a)anon.penet.fi. Due to the double-blind, any mail replies to this message will be anonymized, and an anonymous id will be allocated automatically. You have been warned. Please report any problems, inappropriate use etc. to admin(a)anon.penet.fi.

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Bobby Outman
by Mark Hittinger 17 Dec '03

17 Dec '03

Watched the press conference and decided the guy had some serious problems in the head. I got the impression he was "Ross Perot'ing" on us on national TV! Well - Ross will certainly have an obvious VP choice for 96! :-) Some of us were wondering what was wrong with the water or whatever down in TX? Could it be that the supercollider was actually finished and caused so many problems that they decided to shut it down and claim it was never completed? :-) It phreaks me that this guy was actually NSA too! Admittedly he was a navy guy but..... :-) --------- Whats back with the wrong-ups?

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Re: faster code for neural network
by Ron Davis 17 Dec '03

17 Dec '03

>> Recently I received the code for a neural network. It is written in >> standard ANSI-C. However, running it on the Mac gives me a lot of coffee >> breaks ( it takes 10 min on a IIci, 3 hrs on an LC ). I was wondering if >> anybody out there has experience with this and knows of ways to make the >> code faster ( replacing ANSI routines with Mac-based routines. >> >> If you are the woman or man with this experience mail me! I really need the >> help ( it's all for my master's thesis ). > >You might want to get a match coprocessor for the LC. The ci has one, >and that's probably your problem. (I'm not sure if the LC can take one, >though!) If my memory still works after the two pints I just had, the LC >has a 68020 without any FPU. You might want to upgrade to an LC III and >find out if it has an FPU. I believe neural nets use floats, no? If so >you will most certainly need and FPU if you want decent speed. > The LC does lack a FPU, but you can get one on a card. I'm not sure if this would help though, because it would depend if your compilier would generate FPU code. I know you can with Think. You also might need to take into account which compiler you are using for this kind of program, there seems to be a vairation in efficency between Mac Compilers. As for using toolbox calls, using Apple's SANE library might help. I haven't had much experience with it, but it would probably take advatage of the FPU. E-mail me if I can help anymore. (I'll run the program on my Q700 if you just need a quick speed test.) ___________________________________________________________________________ "I want to know God's thoughts...the rest are details." -- Albert Einstein _________________________________________ Ron Davis rondavis(a)datawatch.com Datawatch, Research Triangle Park, NC (919)549-0711

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Re: faster code for neural network
by Matthew Bernardini 17 Dec '03

17 Dec '03

> >> Recently I received the code for a neural network. It is written in > >> standard ANSI-C. However, running it on the Mac gives me a lot of coffee > >> breaks ( it takes 10 min on a IIci, 3 hrs on an LC ). I was wondering if > >> anybody out there has experience with this and knows of ways to make the > >> code faster ( replacing ANSI routines with Mac-based routines. > >> > >> If you are the woman or man with this experience mail me! I really need the > >> help ( it's all for my master's thesis ). > > > >You might want to get a match coprocessor for the LC. The ci has one, > >and that's probably your problem. (I'm not sure if the LC can take one, > >though!) If my memory still works after the two pints I just had, the LC > >has a 68020 without any FPU. You might want to upgrade to an LC III and > >find out if it has an FPU. I believe neural nets use floats, no? If so > >you will most certainly need and FPU if you want decent speed. > > > > The LC does lack a FPU, but you can get one on a card. I'm not sure if > this would help though, because it would depend if your compilier would > generate FPU code. I know you can with Think. You also might need to take > into account which compiler you are using for this kind of program, there > seems to be a vairation in efficency between Mac Compilers. > > As for using toolbox calls, using Apple's SANE library might help. I > haven't had much experience with it, but it would probably take advatage of > the FPU. > > E-mail me if I can help anymore. (I'll run the program on my Q700 if you > just need a quick speed test.) > ___________________________________________________________________________ > "I want to know God's thoughts...the rest are details." > -- Albert Einstein > _________________________________________ > Ron Davis rondavis(a)datawatch.com > Datawatch, Research Triangle Park, NC (919)549-0711 > > That, or use an AV. If you are adventurous you could use Aplle's Real Time Architecture to offload processing to the 66MHZ DSP processor in the AV series. I know of some examples of ARTA. Matthew Bernardini ----------------------------------------------------------------------------- | Rutgers University Computing Services Matthew Bernardini | Hill Micro/Graphics Center 7804 McCormick | Site-Manager (908) 878-0946 | 017 Hill Center | (908) 932-3129 (908) 932-4921 -----------------------------------------------------------------------------

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RE: RSA is weak link
by Karl Lui Barrus 17 Dec '03

17 Dec '03

-----BEGIN PGP SIGNED MESSAGE----- > ...the IDEA encryption algorithm used in PGP is actually > MUCH stronger than RSA given the same key length. Even with a 1024 bit > RSA key, it is believed that IDEA encryption is still stronger, and, > since a chain is no stronger than it's weakest link, it is believed that > RSA is actually the weakest part of the RSA - IDEA approach. >Confirmation? True; it is more expensive to do a brute force search over the IDEA keyspace than it is to factor a 1024 bit number using the best known factoring algorithm :) I did some calculations once and I think the crossover point is between 1500 and 1600 bits, at which point factoring becomes more difficult than searching. -----BEGIN PGP SIGNATURE----- Version: 2.3a iQCVAgUBLUA1OoOA7OpLWtYzAQGjwwQAwhDqTc6TKZqEjfO1xbC1llasfVfOL3wM 72ofDeWtw7vtdxFb98iLShomdwr12G6I+7qbHwzKyLM5+r/T/DzNRAW2e+MD894Y DNAZazRz2YLuiGpr0LBSC1S6EyFbtcuwoPh1U5LORyUrEo4YCJsYYoFfcnN+Vb8B ddv28VkktBs= =irY2 -----END PGP SIGNATURE-----

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Knowledgeable people in the Boston area
by Alan (Miburi-san) Wexelblat 17 Dec '03

17 Dec '03

I know that some members of this list are in the Boston area; I'm also wondering if any of the "names" in crypto live up here. I'm trying to arrange a talk (elementary level) for a group of human-interface designers I chair and am hunting up speaker ideas. I will be out of the office tomorrow, but will respond to emails Monday. Thanks! --Alan Wexelblat, Reality Hacker, Author, and Cyberspace Bard Media Lab - Advanced Human Interface Group wex(a)media.mit.edu Voice: 617-258-9168 Page: 617-945-1842 an53607(a)anon.penet.fi All the world's a stage and most of us are desperately unrehearsed.

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DeTwEiLeR IdIoCy (was Re: SQUISH IDIOCY)
by lefty＠apple.com 17 Dec '03

17 Dec '03

"Leisure Suit" Larry Detweiler writes: > >Do YOU really think that *anything* can be posted without ANYONE being >accountable? YOU cypherpunks, YOU are nothing but drenched, permeated, >rotton, noxious IDIOTS. Even J. Helsingius, operator of the most >reliable anonymous site ever, has apparently censored S.Boxx in >response to YOUR pressure. Doesn't it bother you to realize that your >most treasured beliefs, the most sacred elements of your religion, are >nothing but LIES? YOU have clung to the illusion that no one is >accountable for anything, when in fact YOU VIOLATE and DEBASE YOUR OWN >SACRED RELIGION. Heh. Detweiler as McElwaine. Pull the other one, Larry. -- Lefty (lefty(a)apple.com) C:.M:.C:., D:.O:.D:.

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RSA 'weak link' in PGP?
by fnerd＠smds.com 17 Dec '03

17 Dec '03

I just got (what I think is) the alt.security.pgp faq. I quote: ...the IDEA encryption algorithm used in PGP is actually MUCH stronger than RSA given the same key length. Even with a 1024 bit RSA key, it is believed that IDEA encryption is still stronger, and, since a chain is no stronger than it's weakest link, it is believed that RSA is actually the weakest part of the RSA - IDEA approach. Confirmation? -fnerd quote me - - cryptocosmology- sufficiently advanced communication is indistinguishable from noise - god is in the least significant bits -----BEGIN PGP SIGNATURE----- Version: 2.3a aKxB8nktcBAeQHabQP/d7yhWgpGZBIoIqII8cY9nG55HYHgvt3niQCVAgUBLMs3K ui6XaCZmKH68fOWYYySKAzPkXyfYKnOlzsIjp2tPEot1Q5A3/n54PBKrUDN9tHVz 3Ch466q9EKUuDulTU6OLsilzmRvQJn0EJhzd4pht6hSnC1R3seYNhUYhoJViCcCG sRjLQs4iVVM= =9wqs -----END PGP SIGNATURE-----

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SQUISH IDIOCY
by L. Detweiler 17 Dec '03

17 Dec '03

Quite a few people have been harassing me and my postmaster over this ridiculous SQUISH idiocy that is bouncing and reverberating around the net. (Unfortunately the `Medusa Meme' is very powerful and I believe many people are imitating me in repropagating some of the `memes' I originated for cheap thrills.) However, I remind YOU, cypherpunks, that I am NOT responsible for anything that comes out of YOUR remailers. If YOU wish to assault ME or MY POSTMASTER (who has far better things to do with his time than deal with YOUR smear campaigns and mailbombs) over anything that I post, YOU must first prove that I posted it. but even if you do, if I posted it through a remailer, I am NOT RESPONSIBLE. I remind you, THAT IS THE POINT OF YOUR REMAILERS. If YOU wish to believe that things that come out of YOUR remailers may be ANONYMOUS DEATH THREATS or LIBEL or HARASSMENT of different mailing lists I encourage YOU to rethink YOUR design. YOU have made YOUR remailers. they are YOUR tool. If YOU blame ME for ANYTHING that comes out of YOUR remailers, if YOU hold ME ACCOUNTABLE, it only proves what drenched, permeated, rotten, noxious HYPOCRITES YOU are. YOU who advocate that no one is responsible for anything on the net, YOU are the ones who are yelling and ranting at ME and MY POSTMASTER, about idiocy that YOU are responsible for. Do YOU really think that *anything* can be posted without ANYONE being accountable? YOU cypherpunks, YOU are nothing but drenched, permeated, rotton, noxious IDIOTS. Even J. Helsingius, operator of the most reliable anonymous site ever, has apparently censored S.Boxx in response to YOUR pressure. Doesn't it bother you to realize that your most treasured beliefs, the most sacred elements of your religion, are nothing but LIES? YOU have clung to the illusion that no one is accountable for anything, when in fact YOU VIOLATE and DEBASE YOUR OWN SACRED RELIGION. YOU are now going to blame ME for ANYTHING that crosses your path, that even mildly displeases YOU. I AM NOT RESPONSIBLE FOR YOUR OWN BLACK KARMA.

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