An RTC (Real Time Clock) is a hardware component in computers and other electronic devices that maintains accurate time and date information, even when the device is powered off. It uses a small battery to keep running independently of the main power supply, ensuring the system clock remains correct. In cybersecurity, the RTC is important for maintaining accurate timestamps for system logs, certificates, and scheduled tasks. If compromised, attackers may manipulate time records to hide malicious activities or disrupt security protocols. Secure RTC management is essential for reliable auditing, incident response, and maintaining the integrity of time-dependent security mechanisms.