Security News > 2019 > September > Another Side Channel in Intel Chips

Not that serious, but interesting: In late 2011, Intel introduced a performance enhancement to its line of server processors that allowed network cards and other peripherals to connect directly to a CPU's last-level cache, rather than following the standard (and significantly longer) path through the server's main memory. By avoiding system memory, Intel's DDIO­short for Data-Direct I/O­increased input/output bandwidth and...

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https://www.schneier.com/blog/archives/2019/09/another_side_ch.html