1 Lecture: Security Topics: Spectre and Meltdown

natalia-silvester
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1 Lecture: Security Topics: Spectre and Meltdown
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1 Lecture: Security Topics: Spectre and Meltdown attacks, information leakage, integrity verification 2 UMA High Bandwidth Memory uses wiring on a silicon substrate (interposer) to achieve high bandwidth; uses 3D-stacked memory chips to

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01
1 Lecture: Security Topics: Spectre and Meltdown attacks, information leakage,
integrity verification<br>
02
2 UMA High Bandwidth Memory uses wiring on a silicon substrate
(interposer) to achieve high bandwidth; uses 3D-stacked
memory chips to increase capacity on the substrate

Apple UMA uses similar technology to connect the
processor and GPU to high-bandwidth memory – both can
access the same memory, so no copies needed Source: Natalie Enright Jerger, sigarch.org/blog<br>
03
3 Hardware Security Several types of attacks: physical access to hardware,
compromised OS, untrusted co-scheduled applications

Defenses include: hardware permission checks, encryption,
microarchitecture partitions, signature checks, trusted
execution environments like Intel SGX

Information leakage still unresolved – exploited by Meltdown,
Spectre, and many subsequent attacks<br>