Terms of Service

1. Scope & Nature of the Service

Chamando.eu is an independent, non-commercial interpersonal communications client and gateway designed for European Economic Area (EEA) end users. It provides cross-platform interoperability with designated gatekeeper messaging platforms (including WhatsApp and Messenger, operated by Meta Platforms Ireland Ltd) pursuant to Article 7 of Regulation (EU) 2022/1925 (Digital Markets Act - DMA).

Chamando.eu is strictly intended for peer-to-peer (P2P), consumer-level messaging. It does not provide merchant processing, order automation, or enterprise customer relationship tools.

2. End-to-End Encryption & Security (Signal Protocol)

All 1:1 cross-platform communications delivered through Chamando.eu are cryptographically secured using the Signal Protocol (incorporating Double Ratchet, Curve25519, SHA-256 and AES-GCM). PreKeys and identity ratchets are validated peer-to-peer. Chamando.eu servers and intermediate relays have zero mathematical access to plaintext content, media keys, or conversation histories.

3. User Identity & E.164 Verification

In accordance with DMA interoperability specifications, user accounts are tied to valid international E.164 mobile numbers verified via two-factor SMS authentication. Users retain full autonomy over their display profile and may revoke local ratchet keys or terminate sessions at any time via the application settings.

4. Gatekeeper Interoperability & Opt-In

Cross-network communication occurs exclusively when both the Chamando.eu user and the Meta/WhatsApp user have explicitly opted into third-party chat exchanges. Neither platform exerts governance, moderation, or liability over the technical infrastructure of the other beyond the standardized cryptographic boundary.

5. Contact & Compliance

For questions regarding technical compliance, DMA Article 7 interoperability implementation, or regulatory inquiries, contact interop@chamando.eu.