Signature-Based Detection is a cybersecurity method that identifies threats by comparing data against known patterns or signatures of malicious activity. These signatures are created from previously identified malware or attacks, allowing security systems to quickly recognize and respond to similar threats. This detection technique is commonly used in antivirus software and intrusion detection systems. While effective for known threats, Signature-Based Detection may struggle with new or unknown malware that does not have a predefined signature, making it essential to complement this method with other detection strategies for comprehensive security.