ASM z80 Machine Lang Project
Project ID:
329472Project Type:
FixedBudget:
$30-$250 USD
Project Description:
Project will require the ASM/Z80 programmer to code for the TI-83 Plus calculator. This project is not a game, nor is this project an application. The project is a secruity suite.The ASM/Z80 programmer will code 3 security scripts for TI-83 plus using: education.ti.com/downloads/guidebooks/sdk/83p/sdk83pguide.pdf
Program #1
1) Extract the serial id from the calculators certification FLASH ROM memory segment. Each calculator has 16bytes of address space containing such information.
E-mail me if you have questions on this stage.
Program #2
1) Encrypt the serial id using a 256-bit key.
2) Store the encrypted serial back on the calculator to a secret memory address location.
E-mail me if you have questions on this stage.
Program #3
1) This program will launch only if the calculators serial id matches the one that was installed by Program #2.
2) This program will launch ONLY if the calculator is a TI-83 Plus.. which means the program must fail if the device has been loaded on a TI-83, 84, or 89. You can check the certification memory segment for related information.
E-mail me if you have questions on this stage.
The above three programs will ensure un authorized copying of program #3 cannot occur. Also, program #3 may be layered into our proprietary software which was coded in TI-83's basic like language.
Skills required:
Electronics, Engineering, Mobile Phone, Script Install
Public Clarification Board
3 messages
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micro7c
Hammarberg,
Maybe it was right to split the program, because first step to get the serial and send it to an external authorizer, then getting the hash as you recommended and storing it.over 3 years ago
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Hammarberg
Why encryption? As no encryption algorithm have been specified, shouldn't a hash service?
Why splitting up the program in three parts? Script #2 needs the serial to encrypt so it also needs to be able to read it... So does script #3, which basically are script #2 without the storing but adding the reading/verifying part...
/Jonasover 3 years ago
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micro7c
Hello,
Regarding program #2: What is the encryption algorithm?
Expect upgrading the project to allow rated users to bid.
Regards,over 3 years ago
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slovati
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slovati
From Italy
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Foundation EUFreelance.com Member
bosebonas
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bosebonas
From Cameroon
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Foundation EUFreelance.com Member
Foundation Freelancer.co.uk Member