Shawn Ng
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Systems

3 deep dives tagged Systems, newest first.

The Scary Truth About Your Phone's SIM Card

· 8 min read

Your SIM card is a computer with a CPU, OS, and network stack, running carrier applets you cannot audit. Inside the SIM, Simjacker, and what you can do.

  • security
  • mobile
  • sim

The Bug That Killed the Lights for 50 Million People

· 7 min read

How a race condition in power grid software helped cause the 2003 Northeast blackout, which cut power to an estimated 50 million people.

  • software-bugs
  • systems
  • race-conditions

Why Cache Misses Are the Real Performance Killer

· 7 min read

Understand how CPU cache misses destroy performance and learn cache-friendly coding patterns that can deliver up to 100x speed improvements.

  • performance
  • systems
  • cpu-cache

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