(also CPU cache)
A memory cache is a data storage layer that temporarily stores frequently accessed data and instructions to speed up the performance of a computer system. It serves as a speed optimizer between the processor and the RAM, reducing memory access latency. When the processor needs to access data, it checks the memory cache, and if the data is there, it quickly grants access to it. Although a memory cache is not a security risk by itself, hackers might misuse it to leak users’ data or for malicious activities. More precisely, a memory cache gathers sensitive data, such as passwords and encryption keys, which attackers can exploit to gain unauthorized access to the data. Because of this, protecting the memory cache from hacker attacks is a necessity.
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