To keep hardware safe, cut out the code’s clues

Imagine you’re a chef with a highly sought-after recipe. You write your top-secret instructions in a journal to ensure you remember them, but its location within the book is evident from the folds and tears on the edges of that often-referenced page.

Much like recipes in a cookbook, the instructions to execute programs are stored in specific locations within a computer’s physical memory. The standard security method — referred to as “address space layout randomization” (ASLR) — scatters this precious code to different places, but hackers can now find their new locations.

Instead of hacking the software directly, they use approaches called microarchitectural side attacks that exploit hardware, identifying which memory areas are most frequently used.