01
Connect
Connect your phone to your cold wallet using Bluetooth Low Energy (BLE).
The future of cold storage
Your crypto.
Your keys.
Your control.
Redefining crypto security with Bluetooth connectivity, offline transaction signing, and privacy-first technology.
A project in development · Security claims are design goals
ONLINE DEVICE
NETCOLD
$ 12,842.09
TransactionReady to sign
NCL
ISOLATED
PRIVATE KEYS
Authenticated BLE channel · Keys never leave device
01 / The protocol
Security that
stays offline.
A deliberate path for every transaction — from preparation to broadcast, with your signing device kept apart.
02
Sign Offline
Prepare transactions on your phone and sign them on the cold wallet. Private keys stay on the signing device.
03
Broadcast
Return the signed transaction to your phone, which broadcasts it when internet access is available.
02 / The architecture
Built around
less exposure.
NetColdLink explores a more intentional relationship between your wallet, your devices, and the network.
Offline Key Protection
Keep private keys isolated from internet-connected devices.
Bluetooth Connectivity
Explore secure nearby communication without putting the cold wallet online.
Privacy-Focused Technology
Explore zero-knowledge cryptography inspired by Zcash.
Self-Custody
Retain control over your own digital assets and wallet keys.
Security by Design
Pair devices, verify transactions, and minimize exposure by design.
03 / The people
Privacy is
a feature.
We are a team of white-hat hackers and privacy enthusiasts building toward a safer future for digital assets.
NetColdLink explores a different approach to crypto security, combining offline key storage, Bluetooth connectivity, and privacy-focused cryptography. Our mission is to help people take greater control of their digital assets and financial privacy.
Built for privacy. Designed for control.
04 / Documentation
Know the
design.
A concise guide to the proposed architecture, security assumptions, and development boundaries.
Concept and development stage. NetColdLink is not an audited, production-ready wallet. Never enter a real recovery phrase or deposit real funds into a prototype.
Architecture
The companion application prepares and broadcasts transactions while the cold-signing device keeps private keys isolated and signs locally.
Security model
BLE is a transport layer, not a trust boundary. Pairing, authentication, replay protection, transaction parsing, and explicit approval are essential.
Privacy principles
NetColdLink is designed around data minimization, local-first operation, transparent permissions, and no secret uploads.
Development status
NetColdLink is a concept in development. Supported networks, production security claims, audits, and launch dates have not been announced.
PrepareReviewSign offlineBroadcastConfirm
View documentation overview In development
Your keys
deserve better.
An entirely different approach to cold-wallet security is coming. NetColdLink is building toward a more private, security-focused crypto experience.
Contract address
3DxfRpfbN6xKjpRwo9PvYLyS42ayrr8JWrAXwnT6nhcu
02 00 00
Launch window begins in approximately two hours