Re: DRAM data persistence
- From: Robert Baer <robertbaer@xxxxxxxxxxxxx>
- Date: Tue, 03 Jul 2007 00:54:48 GMT
Richard Henry wrote:
I remember years ago hearing about a security problem with DRAM, thatAges ago (30++years?), when RAM was PMOS, one of the Intel chips (needed 3 supplies, the rest i do not remember) was so well made that selected chips could store data for a few days without power.
data could partially persist in the DRAM cells through a power-off/
power-on cycle and might be retireved by careful application of power
and reading of the DRAM contents. Does anyone remember details of
this?
The cells were huge compared to anything made today,and that size was one factor that made such long-term storage possible.
These daze, the only places where data is persistent, is the BIOS CMOS chip and the hard drive(s).
.
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- From: Richard Henry
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