Open Source · Decentralized · Encrypted
Launching 2026

Your Files.
Your Network.

Encrypt your files on-device. Distribute them across a trustless peer-to-peer network. Turn any device into a decentralized cloud server and earn from your unused storage.

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Features

Built for privacy, designed for scale

Every layer of Centram is engineered to keep your data safe while making decentralized storage practical and rewarding.

End-to-End Encrypted

AES-256-GCM encryption with per-chunk derived keys. Your passphrase never leaves your device. Zero-knowledge storage.

Decentralized Network

No single point of failure. Files are chunked and replicated across 3 independent peers using Kademlia DHT discovery.

CenTrust Reputation

Score 0-100 trust system. Higher trust earns up to 50% gas fee discounts and priority in chunk allocation.

Cross-Platform

Native apps for macOS, Windows, Linux, Android, and iOS. Plus a web dashboard for monitoring your node.

Blockchain Verified

Proof of Storage consensus ensures nodes actually hold your data. Every allocation is recorded immutably on-chain.

Smart Economics

Share idle disk space as a Cloud Node and earn on your terms. Set your own price per GB/month. Higher trust scores unlock up to 50% fee discounts.

How It Works

Four steps to decentralized storage

Upload a file and Centram handles encryption, distribution, verification, and availability automatically.

1

Encrypt

Your file is encrypted on your device using AES-256-GCM. A master key is derived from your passphrase via PBKDF2 with 100,000 iterations.

PBKDF2 → HKDF → AES-256-GCM
2

Distribute

The encrypted file is split into 4 MB chunks. Each chunk is replicated to 3 peers, selected by trust score and available capacity.

4 MB chunks × 3 replicas
3

Verify

Storage proofs are recorded on the blockchain. Merkle trees verify integrity. Peers earn trust by proving they hold your data.

Proof of Storage → On-chain
4

Access Anywhere

Your encrypted data lives across always-on Cloud Nodes. Download and decrypt on any device, anytime — no central server needed.

Cloud Nodes → Always On
Your Node Peer A Peer B Peer C Peer D
Decentralized Cloud

Your Device.
A Cloud Server.

Turn any device into a persistent storage node. Serve encrypted data to the network, earn rewards, and help build cloud infrastructure with no central authority.

24/7
Always-On
AES-256
Zero-Knowledge
You
Set the Price

Earn From Idle Space

Share your unused storage and set your own price per GB/month. The network handles discovery, payments, and reputation automatically.

Zero-Knowledge Hosting

All data is AES-256-GCM encrypted before it arrives on your node. You physically cannot read what you store — privacy by design.

Built-In Redundancy

Every file is replicated across 3+ independent nodes. If one goes offline, the network re-replicates automatically to maintain availability.

Architecture

Five layers. One system.

From UI to network, every layer is purpose-built for decentralized storage.

Client Layer
Desktop · Mobile · Web · CLI
↓
Daemon Layer
API · Blockchain · Economics · Storage
↓
Cloud Layer
Cloud Nodes · Replication · Pricing · Availability
↓
Crypto Core
AES-256-GCM · PBKDF2 · HKDF · Merkle Trees
↓
Network Layer
TCP · Kademlia DHT · Noise Protocol · Relay
256
Bit Encryption
AES-256-GCM with authenticated tags
3x
Replication
Every chunk stored on 3 independent peers
18
Protocol Messages
Custom binary P2P wire protocol
24/7
Cloud Availability
Always-on Cloud Nodes keep data accessible
Platforms

Runs everywhere you do

Native performance on every platform. One network, seven ways in.

macOS

Native desktop app

Windows

Native desktop app

Linux

AppImage + DEB packages

Android

Native mobile app

iOS

Native mobile app

Web

Monitoring dashboard

Cloud Node

Persistent storage server

Capabilities

Built with precision

Every component chosen for performance, security, and reliability.

AES-256-GCM
Encryption
Files are encrypted on your device before leaving it. No one can read them without your passphrase — not even us.
Passphrase → PBKDF2 (100K rounds) → Master Key Master Key → Chunk Key 1, Key 2, Key 3... Each chunk → AES-256-GCM → Encrypted
Merkle Tree
Integrity Proofs
Verifies file integrity with a hash tree. If even one byte changes, it's instantly detected — no need to re-download the full file.
Root Hash / \ Hash AB Hash CD / \ / \ H(A) H(B) H(C) H(D) | | | | [A] [B] [C] [D] ← chunks
Kademlia DHT
Peer Discovery
Finds peers and data across the network in just a few hops — no central directory needed. Scales to millions of nodes.
You → ask Peer A: "Where is chunk X?" A → "Try Peer B" → B → "Try C" C → "Found it!" (O(log n) hops)
REST + WebSocket
API Layer
REST for file operations, WebSocket for real-time updates like transfer progress and peer status. No polling needed.
REST → GET /files, POST /upload, DELETE /:id WS → transfer %, peer joins/leaves Events: "chunk_stored", "peer_connected"
P2P Mesh Network
Networking
Direct node-to-node connections. If one peer goes down, traffic auto-reroutes. No single point of failure.
[A]----[B]----[C] | \ | / | | \ | / | [D]---[E]---[F]
Proof of Storage
Blockchain Consensus
Nodes must prove they're storing your data. Pass the proof, earn trust. Fail, lose reputation. No mining needed.
Network → "Prove you hold chunk #42" Peer X → submits proof + hash Chain → Valid! → trust +1
CenTrust
Reputation System
A 0–100 trust score. Stay online, pass proofs, and complete transfers to earn lower fees and network priority.
Score: 0 |||||||||||||||||||| 100 New Low Good Trusted Fees: 100% 100% -25% -50%
Gas Fee Economy
Economics
A small 5% transaction fee that shrinks as your trust grows. Providers set their own prices — a competitive marketplace.
10 GB @ $0.50/GB = $5.00/mo Gas fee (5%): $0.25 Trust -50%: -$0.125 Total: $5.125/mo
Cloud Node Protocol
Decentralized Cloud
Turn any device into a persistent Cloud Node. Advertise storage, negotiate prices, and serve encrypted chunks 24/7 to the network.
Advertise → Peers discover node via DHT Negotiate → Price per GB, capacity check Store → Encrypted chunks replicated Verify → Proof of Storage periodic checks
Blog

Latest from Centram

Insights on decentralized storage, privacy, and the future of file ownership.

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Coming Soon

Join the Decentralized Cloud

Centram is launching in 2026. Be among the first to store, share, and earn on the network.

You're on the list! We'll let you know when Centram is ready.

No spam, ever. Only launch updates.

Open Source
End-to-End Encrypted
No Credit Card Required