Authentication success rate is the percentage of authentication attempts that successfully verify an authorized identity. It indicates how reliably an authentication system supports legitimate access. section 7.1.10
Interpret the metric alongside security and operational context:
- Calculate it as successful authentication attempts divided by all authentication attempts, expressed as a percentage. section 7.1.10
- Compare it with the authentication failure rate because frequent failures may indicate security-control problems or poor user experience. section 7.1.10 section 7.9
- Review it with provisioning, de-provisioning, and audit measures rather than treating a high rate as a complete IAM assessment. section 7.1.11
ACME’s IAM target
ACME Corporation set an authentication success-rate target above 95% while improving its IAM processes. Its dashboard also tracked access problems, provisioning and de-provisioning time, and audit problems, helping leadership distinguish authentication reliability from remaining access risks. section 7.1.11
Figure 7.4 The left shows ACME Corp’s identity and access management metrics before IAM improvements. On the right are the identity and access management metrics after IAM improvements.
Use the before-and-after IAM dashboard to compare authentication performance with changes in access management operations. section 7.1.11
