A Hardware Security Module (HSM) provides the best solution for securely backing up MFA seeds in a central, offline location with minimal management overhead. HSMs are specialized hardware devices designed for cryptographic key management, including storing sensitive data like MFA seeds securely. HSMs offer high levels of protection against tampering and provide offline security, making them an ideal choice for backing up cryptographic materials. CASP+ recognizes HSMs as critical components for managing and securing cryptographic keys in centralized, secure environments.
References:
* CASP+ CAS-004 Exam Objectives: Domain 3.0 - Enterprise Security Architecture (HSM and Secure Key Management)
* CompTIA CASP+ Study Guide: Secure Backup and Key Management with HSM