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Messages - stampsm

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General Discussion / Linux On Ps3 And Psp!
« on: January 31, 2007, 02:34:03 am »
remeber that the processor's clock speed on the psp is software configurable, so most likely it starts out at a slow base speed and has to be changed to a higher speed by the software(firmare). the guy who did this might not have taken this into account.

this is the only thing i can think of that would cause such a poor performance

PocketPenguin / Intro & Faq
« on: January 31, 2007, 02:22:02 am »
i think you misunderstand pgp encryption. it only uses rsa or dsa for encryting a key that was used for a symectrical cypher on the data (such as AES) security is covered elsewhere, but its encrypted and tamper proof (no bit flipping allowed) but for the kernel and initrd only as all other data is changable so i expect that you rely on the fact that the initrd and kerenel are garenteed to be correct and use them to verify the rest of the device.

i want to provide a secure path of high assurence booting to the kernel, what the kernel does afterwards is its problem but i also want to leave the kernel to do the security stuff rather than the bootloader/bios the only way to do this in a secure manner is to ensure the integrity fo the kernel and then let the kernel ensure the integrity of the filesystem you boot from
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i guess in my madness i did not explain myself very good as that was exactly what i was thinking.  you do some sort of check to verify the kernel and key system files have not been tampered with then load them and hand over control over to them. then they can be configured to do as little or as much security checks of their own on the rest of the system as you boot it.

PocketPenguin / Intro & Faq
« on: January 31, 2007, 02:17:24 am »
well since SD has only 9 pins it would not be to hard to have a one of those flexible brown cable thingies (not sure what they are called) that break out the internal micro-SD slot into a regular SD card holder. it would be less work for the devoloper to keep swapping out cards since you do not need to take out the battery just turn the device off. and you can have 4-5 different SD cards you just turn the device off and plug a different one in and boot into a whole new operating system configuration. plus you can have up to 4 gigs of space (plus possibly 4 more gigs in the other SD slot) to work with and possibly even have enough space to do native compilation of the programs (some programs like need to be natively compiled, though i have heard it can take a few days to compile on an ARM system) . basically you take the same case the consumer gets (or close to the same) and just make a breakout cable to plug in a full size SD card holder externally.

PocketPenguin / Intro & Faq
« on: January 30, 2007, 08:46:53 pm »
- Hard to argue with stampsm, but I'd like one full-size slot as well, unless we can get three or four micros and do that Raid thing.  (wolfish grin)  I think I prolly want a full 'cause they go to 4Gb, and with SDIO there are non-memory peripherals available for it.  Not that I own any, mind you, because the Z uses CF for this, but the PP won't have CF.  Seems like a nice thing to have, though.
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yep full size slot and micro one would work. full size for user access and micro for operating system files (or something like this). and CF would be nice IF you can find the space to squeeze it in, or use the CF (actually IDE) port on the processor for peripherals.

PocketPenguin / Intro & Faq
« on: January 30, 2007, 08:43:19 pm »
the huge flash on the iphone is tempting but its somthing that can bite you on the arse unless you go all out (like apple did). at lesat with the slots you can chose or reuse what you have

im guessing the full sized will  be the external one  might as well make the micro one externaly acsesible for devs or does that partially defeat the security, must think about that. probelly not however

CF is nice and i cant cemeber where i am at with it (if its in or not) i think its really a case of lets see how much room we have left. if it did go in it would most likly not be removable for some reason (there was somthing technical holding it back, somthing to do with the ata mode)
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make the micro one an internal one like on the ROKR cell phone. it makes for a very small size holder with no mechanics needed to eject it. if it has operating system files you do not want the user to "accidentially" take it out while it is running anyways. it is easy to make it secure while still making it easy to remove if you have an asymetric encryption system(like pgp) that has a private and public key running in the small firmware (rom) inside the device. you just check the keys on the main files or file clusters and if they match up with the private key you know the files have not been tampered with (well there are ways around this, but NO security is foolproof). if the files are detected to be tampered with you can make the device do whatever you programed it to do from continuing to run to "scorched earth policy" (wipe the device clean of certain files set as secure.

For Sale / Wanted / Sold: Sl-3100 (rarely Used)
« on: January 30, 2007, 08:26:04 pm »
Hello guys, I've sold the zaurus. Thanks for your interest.
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i guess that teaches me to not wait to long to make up my mind.  
was a good deal

For Sale / Wanted / Sold: Sl-3100 (rarely Used)
« on: January 29, 2007, 03:34:03 am »
Hello guys,

I would like to sell SL-C3100, rarely used in excellent condition.

What I'm selling is:

Contents of C3100 box (including AC adapter, original battery, headphones)
Wireless card: Planex Wifi GW-CF11X
Retractable USB sync and power cable

I'm in Montreal, QC and if possible I would like to keep shipping within Canada.

Price 450.00 CAD + shipping or equivalent in USD.

Payment: paypal.

Pictures available on request.

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sounds good initially, i just have to see what the USD equivalent it. i have have been looking for a 3100 for a while. can you give me a guess on what shipping to the US is (zip code 89110 if you need it)

pm me thanks.

PocketPenguin / Intro & Faq
« on: January 27, 2007, 03:46:30 pm »
fairly, things change and i drop some things i consider "minor" and add them back all the time, it depends on the moment.

at least its a rough draft, basically things that change are mainly cameras and "gadget" features. the core ram and cpu stuff as well as conectivity options will stay the same

i would love to throw a small fpga in there but it will most likly be a cpld instead and non hackable, upgradable yes but not somthing you can change at a whim (it will be doing alot of interfacing and "language" conversion

biometrics look to be dropped as there are better ways of authenticating and i belive it will be abused. there is an option however that if a camera is included that it could do iris verefication.

anyone still want IR? also mini sd or full sized, i cant remeber every ones postion on that (or mine for that matter) or one full sized and one micro?. the micros are ones that shouldnt be pulled out to ofteen as they are a PITA to remove (ie this is the rootfs)
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1 gig micro-sd ( or even 512MB, any size over 128MB should be enough) holding the rootfs and the basic operating system files sounds good. for security reasons you can always do a crc32 checksum on all the data on the card to verify it has not been tampered with or even sign it with a private key and have the public key in the processor's memory. that way you can have upgrades released and still be able to make sure it is secure. upgrading the operating system would be much easier since all you have to do is pop the card into any card reader and do a image onto it without having to worry about flashing the device itself (this can make it really hard to brick your device), you can even have two partitions on the card, one for the operating system that can be checked for integrity and another that is user rw and holds the /home directory.

for lower volume production the micro-sd would actually be cheaper than buying flash chips and having that much more board design work, since you can get 512MB micro-sd for less than 10 USD.

the whole design goal would be to make the hardware as flexible as possible while still making it simple to design and be cost effective. (when you get down to it these are not easy goals to hit)

PocketPenguin / Security Features
« on: January 16, 2007, 04:40:05 am »
here is a pdf file on the security features built into the i.mx31 processor

PocketPenguin / Security Features
« on: January 16, 2007, 04:35:32 am »
you forgot about locking out jtag access. it is a one way operation since once you blow the fuse there is no way to undo it (ok let me rephrase this no way anyone in thier right mind would want to try), but it make even using external hardware hacking to get into the device nearly impossible if you got really sensitive info on it.

OESF Announcements / Site & Forum Move Complete
« on: December 24, 2006, 06:11:31 am »
it finally came back on for me today i have been trying to get on a few times a day since it was moved.

PocketPenguin / Fabber@home
« on: December 09, 2006, 05:55:29 am »

PocketPenguin / Fabber@home
« on: December 09, 2006, 05:43:17 am »
nice find

PocketPenguin / Bluetooth Watch
« on: December 08, 2006, 03:03:46 am »
the price is a little high i think, but it is a good idea.

PocketPenguin / Alternative Design For The Ppz
« on: December 08, 2006, 02:55:28 am »
well if you do use a 16/9 wide screen format screen at 5 inches it will be about 2.45 x 4.35 inches. while the 4 inches 4/3 standard format screen at 4 inches is 2.4 x 3.2 inches. it would have nearly the same height but a little over an inch in width extra. so you should be able to almost put it in your pocket the same as you do a Cxxx series zaurus except it would be a little longer.

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