Memory bandwidth contention in shared DRAM can carry covert signals between CPU and GPU on mobile SoCs without privileges, at rates up to 6.4 kbps.
Analyzing memory man- agement methods on integrated cpu-gpu systems
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MC3: Memory Contention based Covert Channel Communication on Shared DRAM System-on-Chips
Memory bandwidth contention in shared DRAM can carry covert signals between CPU and GPU on mobile SoCs without privileges, at rates up to 6.4 kbps.