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by westurner 559 days ago
From https://blog.3mdeb.com/2024/2024-12-13-ram-data-decay-resear... :

> The main goal is to determine the time required after powering off the platform for all the data to be irrecoverably lost from RAM.

Cold boot attack: https://en.wikipedia.org/wiki/Cold_boot_attack

Data remnance: https://en.wikipedia.org/wiki/Data_remanence

Ironically, quantum computers have the opposite problem; coherence times for QC qubits are still less than a second: there is not yet a way to store qubits for even one second.

(2024: 291±6µs, 2022: 20µs)

"Cryogenically frozen RAM bypasses all disk encryption methods" (2008) https://www.zdnet.com/article/cryogenically-frozen-ram-bypas...

And that's part of why secure enclaves and TPM.

1 comments

From https://news.ycombinator.com/item?id=37099515 :

> If quantum information is never destroyed – and classical information is quantum information without the complex term i – perhaps our [RAM] states are already preserved in the universe; like reflections in water droplets in the quantum foam

According to the "Air gap malware" Wikipedia article's description of GSMem, the x86 RAM bus can be used as a low power 3G antenna. And, HDMI is an antenna, and, Ungrounded computers leak emanations to the ungrounded microphone port on the soundcard.

Air gap malware: https://en.wikipedia.org/wiki/Air-gap_malware

Stochastic forensics: https://en.wikipedia.org/wiki/Stochastic_forensics

Back in the day, we called that https://en.wikipedia.org/wiki/Van_Eck_phreaking