What is Online Responder?
Online Responder A network service that provides real-time certificate status information, typically using the Online Certificate Status Protocol (OCSP) to validate if a certificate is revoked or still valid.
Source: ISO 27001, NIST Cybersecurity Framework, MITRE ATT&CK
How is “Online Responder” Used in Practice?
An online responder using OCSP improves the efficiency of certificate revocation checking compared to CRLs.
Certification Exam Relevance
Who Needs to Know This Term?
- SOC Analysts
- Security Engineers
- Incident Responders
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What is Online Responder?
A network service that provides real-time certificate status information, typically using the Online Certificate Status Protocol (OCSP) to validate if a certificate is revoked or still valid.
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