Address Space Layout Randomization (ASLR) is a security technique used in computer systems to protect against certain types of attacks, such as buffer overflow attacks. It works by randomly arranging the memory addresses used by a program each time it runs. This makes it difficult for attackers to predict where specific code or data is located in memory, reducing the chances of successfully exploiting vulnerabilities. ASLR is commonly implemented in modern operating systems, including Windows, Linux, and macOS. By randomizing the memory layout, ASLR adds an extra layer of defense, making it harder for malicious software to execute harmful actions. This technique is part of a broader set of security measures aimed at improving overall system resilience.