Počítače s DDR3 je možné hacknúť aj bez chýb v softvéri
Diskusia k článku: Počítače s DDR3 je možné hacknúť aj bez chýb v softvéri
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ECC šťandardný typ SECDED nezaistí
Od: Rudolf Dovičín
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Pridané:
2015-03-12 15:55:35
http://goo.gl/AOr10Y
Flipping Bits in Memory Without Accessing Them:
An Experimental Study of DRAM Disturbance Errors (PDF 828 KiB)
"While most words have just a single victim, there are also some words with multiple victims. This has an important consequence for error-correction codes (ECC). For example, SECDED (single error-correction, double error-detection) can correct only a single-bit error within a 64-bit word. If a word contains two victims, however, SECDED cannot correct the resulting double-bit error. And for three or more victims, SECDED cannot even detect the multi-bit error, leading to silent data corruption. Therefore, we conclude that SECDED is not failsafe against disturbance errors."
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