network profile
| bio | website | |
|---|---|---|
| location | Romania | |
| age | 28 | |
| visits | member for | 10 months |
| seen | Mar 29 at 4:49 | |
| stats | profile views | 0 |
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Mar 29 |
accepted | A situation where security by obscurity might be the best solution - or am I wrong? |
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Dec 19 |
comment |
A situation where security by obscurity might be the best solution - or am I wrong? @mikeazo : you are right, I see now that my formulation was unclear. I corrected it. I don't know what percent of microcontrollers have this feature, but I assume either all or at least most of the modern ones. |
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Dec 19 |
revised |
A situation where security by obscurity might be the best solution - or am I wrong? added 11 characters in body |
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Dec 19 |
comment |
A situation where security by obscurity might be the best solution - or am I wrong? @mikeazo : microcontrollers have fuses which prevent reading the contents. You would need an electron-microscope and lot of time and expertise to read out the contents of a protected flash memory. Much higher costs than developing the desired software from scratch. |
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Dec 19 |
comment |
A situation where security by obscurity might be the best solution - or am I wrong? @fgrieu : the method described does not prevent theft in the form of deliberately leaking the software (due to a very small team this risk is negligible), but that was not the intention. The intention was to prevent theft from the publicly released update. |
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Dec 19 |
awarded | Editor |
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Dec 19 |
revised |
A situation where security by obscurity might be the best solution - or am I wrong? deleted 4 characters in body |
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Dec 19 |
asked | A situation where security by obscurity might be the best solution - or am I wrong? |
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Oct 4 |
awarded | Scholar |
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Oct 4 |
accepted | Is there any recent cryptographic algorithm especially designed for low-level processors? |
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Jul 20 |
awarded | Student |
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Jul 19 |
comment |
Is there any recent cryptographic algorithm especially designed for low-level processors? @No, it's not a concern. The microcontroller is secured against reading, and the scope of the problem is small enough that I don't need rotating passwords or similar procedures. A single symmetric key will then be sufficient. |
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Jul 19 |
comment |
Is there any recent cryptographic algorithm especially designed for low-level processors? @RickyDemer: Why? It's not important for me to have the same key for encryption/decryption, neither do I wish to identify the source of the file. I just want to provide a file that the PC program can send to the microcontroller, without the user being able to understand its content. The file, the PC program and the mincrocontroller are all provided by me, not necessarily in the same package. |
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Jul 19 |
comment |
Is there any recent cryptographic algorithm especially designed for low-level processors? @RickyDemer: not necessarily. |
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Jul 19 |
comment |
Is there any recent cryptographic algorithm especially designed for low-level processors? No. The plaintext is generated at a time and place inaccessible to the user of the PC program, so it can be released already encrypted. |
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Jul 19 |
awarded | Supporter |
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Jul 19 |
comment |
Is there any recent cryptographic algorithm especially designed for low-level processors? It doesn't have to be symmetric. I intend to have a PC program send a file to a microcontroller, but the user of that PC program should not be able to access the data in that file or edit its contents in a meaningful way. I intend to place the decryption part into the microcontroller, to deny the possibility to read the data by tapping the wire between it and the PC. |
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Jul 19 |
asked | Is there any recent cryptographic algorithm especially designed for low-level processors? |
