WARPIG Tech Talk - Angel / Angel LCD


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WARPIG Tech Talk - Angel / Angel LCD
Re: Angel IR3 E.D.S

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Posted by WARPIG Tech on January 27, 2002 at 05:16:03:

In Reply to: Angel IR3 E.D.S posted by Snot on January 26, 2002 at 02:44:50:

: What exactly is the E.D.S. on the new angel? It says Encrypted Data Storage self healing software, what exactly is that?

When the data about the IR3's configuration is stored, it has checksum tags at the front and the back. A Checksum is a way that data is verified. Basically if you have a list of say 50 numbers that is your data, you could have a simple checksum that was the total of those 50 numbers. If you are worried that you made a mistake when copying one of those 50 numbers, you could add them all up, if the total you get doesn't match the total from before they were copied you know you made a mistake when copying them. Checksums are a common method of error checking in computer science (internet data packets use them) and were even done by hebrew scholars over 2,000 years ago as a way to make sure they hand copied scripture correctly. Anyhow, if the IR3 discovers that some of its data is damaged, instead of crashing (which was the cause of most board problems on the LCD) the software reads from a previously saved copy, or if one is not available, restores a factory default.

As for the encryption part, that's a way of protecting to make sure that only the factory software is in the board. Without breaking through the physical security seals on the board, the only way to load in software is the infra-red port. The only way to get the infra-red software to accept the new software is to give it the correct security key. It's a rolling key system (the key changes) making it pretty difficult to hack (and if you do hack it, it's only good on that one board, until it rolls) - impossible to hack for the average joe. Pretty much it's the most advanced anti-cheater system any paintgun manufacturer has put into place on an electronic paintgun.

I spent 3 hours yesterday tearing apart and going over the IR3 with John Rice, it's designer. Follow the link from the front page of WARPIG for an IR3 preview article. If you have other specific questions, please feel free to ask.

See you on the field,
-Bill Mills

Follow Ups:

Thanks bill N/T Snot
00:39:15 01/28/02 (0)

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Subject:Message:
: : What exactly is the E.D.S. on the new angel? It says Encrypted Data Storage self healing software, what exactly is that? : When the data about the IR3's configuration is stored, it has checksum tags at the front and the back. A Checksum is a way that data is verified. Basically if you have a list of say 50 numbers that is your data, you could have a simple checksum that was the total of those 50 numbers. If you are worried that you made a mistake when copying one of those 50 numbers, you could add them all up, if the total you get doesn't match the total from before they were copied you know you made a mistake when copying them. Checksums are a common method of error checking in computer science (internet data packets use them) and were even done by hebrew scholars over 2,000 years ago as a way to make sure they hand copied scripture correctly. Anyhow, if the IR3 discovers that some of its data is damaged, instead of crashing (which was the cause of most board problems on the LCD) the software reads from a previously saved copy, or if one is not available, restores a factory default. : As for the encryption part, that's a way of protecting to make sure that only the factory software is in the board. Without breaking through the physical security seals on the board, the only way to load in software is the infra-red port. The only way to get the infra-red software to accept the new software is to give it the correct security key. It's a rolling key system (the key changes) making it pretty difficult to hack (and if you do hack it, it's only good on that one board, until it rolls) - impossible to hack for the average joe. Pretty much it's the most advanced anti-cheater system any paintgun manufacturer has put into place on an electronic paintgun. : I spent 3 hours yesterday tearing apart and going over the IR3 with John Rice, it's designer. Follow the link from the front page of WARPIG for an IR3 preview article. If you have other specific questions, please feel free to ask. : See you on the field, : -Bill Mills

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