Android SDK for hardware-backed file signing and verification. ECDSA P-256 via Android KeyStore (StrongBox / TEE). Streaming, offline-only, zero network permissions.
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Updated
Jun 12, 2026 - Kotlin
Android SDK for hardware-backed file signing and verification. ECDSA P-256 via Android KeyStore (StrongBox / TEE). Streaming, offline-only, zero network permissions.
Android file signing app. ECDSA P-256 over Android KeyStore (StrongBox/TEE). Detached DER-encoded .sig output. No INTERNET permission, no telemetry. Standalone sign and verify flows. BSI TR-02102-1, OWASP MASVS, NIST SP 800-186.
Right-click file signing for Windows. Every file carries its parent machine.
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