Which detection technique should be used for an intrusion detection system to validate known signatures?

The appropriate technique for an intrusion detection system to validate known signatures is signature-based detection. This method fundamentally relies on predefined patterns or signatures of known threats to identify potential intrusions. When an incoming data packet matches a signature in the database, the system can promptly recognize it as a malicious activity.

Signature-based detection is effective because it can offer high accuracy and lower false positive rates, given that it is identifying threats based on established criteria. This technique is widely utilized for its efficiency in detecting known vulnerabilities and attacks, such as specific types of malware or exploits that have been previously documented and analyzed.

Other techniques, such as deep packet inspection, which involves analyzing the data packets that flow through a network for protocol compliance and content, may not specifically confirm known signatures but rather assess content for anomalies. Intrusion detection and intrusion prevention systems provide broader capabilities that may include both signature-based and anomaly-based methods, which are not solely focused on validating known signatures.