ARMOR: Adversary Cost Amplification via a Schema-Preserving Password-Hardening Retrofit for Resource-Constrained Systems

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arXiv:2610.14300v1 Announce Type: new Abstract: Internet of Things (IoT) gateways, edge authentication servers, and legacy systems need protection against offline password guessing after credential-database disclosure. Memory-hard key derivation functions (KDFs) are the preferred defense, but their resource requirements can exceed memory or latency budgets. ARMOR addresses this gap with a schema-preserving verifier-side transform for database-only (DB-only) compromise. Secret per-account chains