What is Key Usage?
Key Usage A certificate extension that defines the allowed cryptographic operations for the associated key, such as digital signature or key encipherment.
Source: ISO 27001, NIST Cybersecurity Framework, MITRE ATT&CK
How is “Key Usage” Used in Practice?
The key usage extension in X.509 certificates specifies if a key may be used for signing, encryption, or certificate signing.
Certification Exam Relevance
Who Needs to Know This Term?
- SOC Analysts
- Security Engineers
- Incident Responders
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What is Key Usage?
A certificate extension that defines the allowed cryptographic operations for the associated key, such as digital signature or key encipherment.
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