A concise overview of HDMEx (stable).
Intro
HDMEx is a human, decentralized courier network: your data travels through people, not servers.
Encrypted on your phone, carried peer-to-peer offline, settled on-chain when connectivity returns.
Every mission stays auditable through Proof of Participation (PoP) trails.
One wallet, one explorer, one chain β consistent from the phone to the ledger.
What it is
A delivery is sealed as a programmable capsule: encrypted payload, keys and optional payment, plus audit hashes.
Messages and files move with no central server β anonymous and silent.
The network stays verifiable even when coverage is intermittent.
Payload custody stays under human control, not under servers.
Who itβs for
Journalists & sources: move sensitive documents with no exploitable trace.
Legal & medical: confidential files and patient records, traceable without exposing content.
Businesses: sensitive data and recurring reports, encapsulated payments, very low cost.
NGOs & crisis zones: works offline β physical handover, 100% offline mailboxes.
Imperfect connectivity: built for the billions on intermittent networks; plus transport & IoT.
Products: COURSE vs BAL
COURSE = one-time delivery: Cx initiates & pays, Vx carries, Dx receives, then the mission ends.
BAL = persistent mailbox: a fixed drop that keeps accepting encrypted packages.
Both modes share the same wallet, PoP and explorer.
Payment and decrypt keys travel encapsulated with the payload.
How it works (flow)
Cx encrypts the payload (message/file + metadata) and creates a sealed delivery intent.
A carrier (Vx) relays it offline over a local Wi-Fi hotspot (physical handover) β never in clear.
The recipient (Dx) confirms with the previously derived keys.
Back online, events sync into PoP and become signed blocks validated by Vax.
Roles: Cx initiates & pays β’ Vx carries β’ Dx confirms β’ Vax validates (PoP).
Security & cryptography
Client-side keys: BIP-39 phrase β keys stored encrypted (Secure Enclave/Keystore); the seed never leaves the device.
Chroma Guard rotates secrets monthly, driven by on-chain activity, against harvest-now/decrypt-later.
Standard primitives: AES-256-GCM + SHA3-256 with an internal HDMEx KDF.
Post-quantum: hybrid ML-KEM key seal, incomplete file (AONT) β the carrier never holds the whole file β and ML-DSA signatures.
Internal HDMEx addressing is separate from external wallet addresses.
Proof of Participation (PoP)
PoP records relay/delivery/validation events and ties them to mission hashes.
Participants sign events locally; Vax validate them into signed blocks β straight from their phone.
No proof-of-work: validation is lean, near-zero energy.
Disputes resolve by replaying the encrypted audit trail bound to each event.
Native economy
Paid course: funded by Cx, split on Dx confirmation β 82% carrier (Vx) Β· 15% relay-recipient (Dx) Β· 3% company.
Vax reward: validators earn on a decreasing, capped emission β low sell pressure. Never any burn.
Governance: the team proposes, Vax + team vote; built-in anti-collusion.
Referral & fair growth: a referral tree rewards those who grow the network β value goes to real work.