A backup code is a one-time recovery code a user can store and later use if their normal authentication factor is unavailable. It matters because recovery needs a fallback path, but fallback secrets can become an attack path if stored carelessly.
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What is Backup Code?
Backup codes are commonly issued during MFA setup to help users regain access if they lose a device or factor. They should be stored securely and treated like high-value credentials because anyone with a valid backup code may be able to bypass the normal factor.
What Backup Code Commonly Supports
Common uses include MFA recovery, travel resilience, device-loss recovery, and support burden reduction for self-service access restoration.
Backup Code vs. Primary Authentication Factor
A primary factor is used routinely for login. A backup code is meant for exceptional recovery situations when the normal factor cannot be used.
Frequently Asked Questions
Why are backup codes useful?
Because they provide a practical recovery option without always requiring help desk intervention.
What is the main risk?
If stored insecurely, they can become a quiet bypass of the stronger day-to-day authentication flow.
Related Cybersecurity Terms
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