Address Space Layout Randomization (ASLR) is a security technique used in operating systems to prevent certain types of cyberattacks, such as buffer overflow exploits. ASLR works by randomly arranging the memory addresses used by system and application processes. This randomization makes it much more difficult for attackers to predict the location of specific functions or data in memory, thereby reducing the effectiveness of attacks that rely on knowing exact memory addresses. ASLR is widely implemented in modern operating systems and is considered a fundamental defense mechanism against memory corruption vulnerabilities.