Key Backup

Overview

A key backup may contain a private key, seed, mnemonic, encrypted wallet file, hardware recovery package, or shares produced by a threshold scheme. The correct backup method depends on how the original key was generated, derived, and used.

Copying key material increases recovery options and exposure at the same time. A readable backup can be used by anyone who finds it. An encrypted or split backup may fail if passwords, shares, software, metadata, or required participants are unavailable. Old backups may also retain compromised authority.

Backup policy should define format, encryption, number of copies, locations, access, integrity checks, retention, and destruction. Copies should be separated from daily systems and from each other. Restoration tests must confirm the recovered key controls the intended accounts without exposing production material. Every test should follow controlled handling and audit procedures.

Evidence for Key Backup should preserve incident time, affected identifiers, last known state, claimant and approver checks, backup or share version, actions performed, credentials revoked, assets verified, discrepancies found, and final owner acceptance. For Key Backup, sensitive recovery material must not appear in the incident record.

For Key Backup, important risks include fraudulent recovery requests, guardian collusion, unavailable shares, outdated backups, compromised cloud accounts, missing derivation metadata, untested procedures, and simultaneous loss of primary and backup systems. For Key Backup, independent storage and periodic exercises reduce correlated failure but introduce their own custody obligations.

The scope of Key Backup should identify the protected wallet, key, account, service, or business process; the triggering failure; who may declare the incident; which identity and entitlement evidence is required; and the recovery point and recovery time objectives that govern restoration.