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Listener homologation

The listener (NelfeMemoryListener) is the closed component that measures the score in memory. Its credibility comes not from its (secret) code, but from its homologation - like the closed firmware of a measuring instrument (a technical analogy, not a regulatory claim).

Vocabulary (precise)

  • NelfePlay-homologated: each official build is signed and attested by the publisher.
  • Audited: said only when an independent external audit actually took place.
  • Certified: reserved for a real, formal certification program (accredited body). We do not use it until such a program exists.

Public build sheet

Each listener version publishes: 

{
  "listener_build": "4.2.0",
  "sha256": "…",
  "publisher_signature": "…",
  "released_at": "…",
  "supported_protocol": 1,
  "homologation_suite": "listener-tests-2026.1",
  "audit_report": "…",
  "status": "authorized"
}
Each scoring profile references the authorized builds (allowed_listener_sha256). The passport carries the listener hash before / loaded / after - measured independently by the open component (not by the listener itself, to avoid self-attestation).

Homologation suite (black box, public)

Behavior can be proven without revealing the algorithm:

ROM X + scenario Y → the on-screen score is 12,500 → the official listener must produce 12,500.

The results are public; the memory address and how it is read are not.

Revocation

A flaw in a build? We revoke that build for new sessions (status: revoked) without making old scores unreadable: they stay verifiable with the historical profile and build.

Toward crediting the closed component

Signed binary · public SHA-256 per build · external audit under NDA with a public, code-free report · public SBOM · optional source escrow · public behavioral tests · revocation policy · version history · vulnerability disclosure program.

The limit, again

None of this mathematically proves the listener read the right address. It establishes that a homologated, unmodified build was bound to the right process and that the public rules were applied. Trust in the measurement rests on homologation - a defensible basis, the same as real-world measuring instruments.