Unverified50% confidenceFactExact time
Timing side-channel vulnerabilities arise from string comparison returning as soon as it encounters the first differing character, allowing an attacker to infer the correct HMAC value byte by byte by measuring response time; hmac.compare_digest eliminates this channel through constant-time comparison.
1
Sources
50%
Confidence
Long-term
Relevance
10/13/2026
First Seen
Sources
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