Cose Lib Laravel Package

Product Decisions This Supports

Feature Development

• Digital Identity & Authentication:

  • Enable WebAuthn/FIDO2 attestation and assertion signatures (e.g., for passwordless authentication).
  • Support EU Digital COVID Certificate verification for health pass integrations.
  • Build compact, interoperable signatures for IoT devices (e.g., constrained environments with CBOR).

• Security & Compliance:

  • Replace legacy JWT/RSA signatures with COSE-based signatures for modern cryptographic agility (e.g., post-quantum readiness via EdDSA).
  • Implement selective disclosure for privacy-preserving claims (e.g., age verification without full identity exposure).
  • Enable verifiable credentials (W3C VC) with COSE for decentralized identity systems.

• API & Microservices Security:

  • Secure service-to-service communication with COSE-encrypted payloads (alternative to TLS for message-level encryption).
  • Add MAC-based integrity checks for high-assurance APIs (e.g., financial transactions).

Roadmap Prioritization

• Build vs. Buy:
  • Buy: Use this package to avoid reinventing COSE/RFC 9052/9053 compliance (saves 3–6 months of dev effort).
  • Build: Only if needing custom COSE extensions (e.g., proprietary algorithms) or performance optimizations for niche use cases.
• Phased Rollout:
  • Phase 1: Pilot with WebAuthn or health certificates (low-risk, high-impact).
  • Phase 2: Expand to internal APIs or document signing (higher complexity).

Use Cases

When to Consider This Package

Adopt This Package If:

• You need RFC 9052/9053 compliance for COSE (e.g., WebAuthn, health certs, IoT).
• Your team lacks CBOR/cryptography expertise (library handles serialization/algorithms).
• You require interoperability with existing COSE ecosystems (e.g., EU DCC gateways).
• You’re using PHP 8.1+ and can tolerate minor dependency bloat (spomky-labs/cbor-php).
• Your use case fits signing, MAC, or encryption (not custom COSE extensions).

Look Elsewhere If:

• You need post-quantum algorithms (this package lacks CRYSTALS-Kyber/Dilithium; track RFC 9180).
• Your stack is not PHP (e.g., Python: cose-py, JavaScript: cose-js).
• You require hardware-backed COSE (e.g., HSMs; this is software-only).
• You’re building a custom COSE profile (e.g., proprietary tags/algorithms).
• Your team prefers minimal dependencies (this adds cbor-php, pki-framework).

How to Pitch It (Stakeholders)

For Executives:

"COSE is the future of digital signatures—like JWT but modern, compact, and interoperable. This PHP library lets us:

• Comply with EU health certs without building from scratch (saves €X in dev time).
• Enable passwordless auth (FIDO2) for better UX and security.
• Secure IoT/APIs with lightweight cryptography (reduces attack surface). It’s a ‘buy’ vs. ‘build’ win: MIT-licensed, RFC-compliant, and battle-tested in health/identity systems."

For Engineering:

"This is a drop-in COSE library for PHP 8.1+ that:

• Supports all COSE tags (Sign1, Sign, Encrypt0, Mac0) and 15+ algorithms (ECDSA, EdDSA, RSA, HMAC).
• Integrates with OpenSSL for verification (no custom crypto needed).
• Works with CBOR (via spomky-labs/cbor-php) for compact payloads. Use cases:
• Replace JWTs with COSE for smaller, faster signatures (e.g., WebAuthn).
• Verify EU Digital COVID Certificates in 2 lines of code.
• Secure APIs/IoT with COSE_Encrypt0 or COSE_Mac0. Tradeoffs:
• Adds ~2MB to your vendor dir (cbor-php + dependencies).
• Requires PHP 8.1+ (strict types). Recommendation: Pilot with FIDO2 or health certs first."**

For Security Teams:

"COSE addresses critical gaps in modern cryptography:

• Smaller attack surface than JWT (no base64url, no custom parsing).
• Algorithm agility (swap ES256 for EdDSA without breaking changes).
• Interoperability with EU DCC, FIDO2, and emerging standards. Risks:
• Dependency on cbor-php (audit for vulnerabilities).
• No post-quantum support (monitor RFC 9180 for updates). Mitigation: Use EdDSA (Ed25519) for long-term signatures and HMAC-SHA384 for MACs."**