Intel's Software Guard Extensions (SGX) is a set of security features built into some Intel processors. It allows applications to create secure enclaves, which are protected areas in memory. These enclaves help safeguard sensitive data and code from unauthorized access, even if the operating system or other software is compromised. SGX is particularly useful for applications that handle confidential information, such as financial transactions or personal data. By isolating this information within enclaves, SGX enhances security and privacy, making it harder for attackers to exploit vulnerabilities in the system.