Testnet live — 9 nodes — block —
Your money
is yours.
A privacy-first cryptocurrency where every transaction is shielded by default, supply is cryptographically auditable, and no permission is required to participate.
We’re not just shipping a privacy coin. We’re shipping the model for how privacy coins eventually plug into the open market without compromising — and we did it before anyone else in the space.
Public testnet launches in
--days
--hours
--minutes
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Public testnet is live.
22
Privacy features
100M
Supply cap
0%
Dev tax
16
Ring size
30%
Fee burn
"We built CoinCync on one principle: your money is yours. Not visible to surveillance. Not subject to seizure. Not dependent on permission. Enforced by proofs, not promises."— The CoinCync Manifesto
§ 01
Three principles.
Zero compromise.
§ 01
Private by default
Every transaction is shielded with CLSAG ring-16 signatures, Pedersen commitments, Bulletproofs+ range proofs, and stealth addresses. No opt-out. No transparent mode. Privacy is mandatory.
§ 02
Auditable by anyone
Supply is cryptographically verifiable. Pedersen commitments are additively homomorphic — they balance without revealing amounts. No trusted setup. No ceremony. Anyone can audit.
§ 03
No permission needed
CPU-only RandomX mining. 0% developer tax. No premine. No founder allocation. The Constitution enforces these rules at the protocol level — permanently.
§ 02
Four layers of privacy.
Each layer addresses a different attack surface. Together they provide the strongest privacy guarantees of any cryptocurrency.
Layer 1 — Cryptographic
Protects the content
Who sent. Who received. How much.
- CLSAG ring-16 signatures — real signer hidden among 16 decoys
- Stealth addresses — one-time Ristretto255 destinations
- Pedersen commitments — amounts hidden, homomorphic balance
- Bulletproofs+ — compact non-negative range proofs
- Encrypted memos — ChaCha20-Poly1305 + ECDH
- Key images — double-spend prevention without revealing source
- View tags — 90% faster wallet sync
Layer 2 — Network
Protects the metadata
IP addresses. Timing. Traffic patterns.
- Dandelion++ — random stem path before broadcast
- Noise_XX — Signal-grade encrypted P2P
- Traffic shaping — 0–200ms random jitter
- Constant-rate padding — masks activity patterns
Layer 3 — Wallet
Protects the user
Selective disclosure. Plausible deniability. Recovery.
- Uniform decoy selection — defeats recency analysis
- Time-scoped view keys — export for a specific block range
- Plausible deniability — dual-password encryption
- Auto-churn — Poisson-distributed self-sends
- Dead man's switch — time-locked recovery
- Uniform 2-in/2-out shape — defeats heuristic analysis
- FROST multi-sig — indistinguishable from single-sig
Layer 4 — Constitutional
Enforced by consensus
Hardcoded rules that no one can change.
- Mandatory privacy — no opt-out, no transparent mode
- No surveillance — no blacklists, no freezing, no backdoors
- No balance lookup — no RPC to query an address
- 4th Amendment — financial records constitutionally protected
§ 03
How a transaction works.
Four cryptographic layers protect every transaction. Here's what happens when you send CYNC.
§ 04
Sound money.
Provable scarcity.
An asymptotic emission curve with tail emission and fee burn creates a self-sustaining, naturally deflationary currency.
Supply cap100,000,000 CYNC
Block time120 SECONDS
AlgorithmRandomX CPU-ONLY
Initial reward~50 CYNC/BLOCK
Tail emission0.6 CYNC/BLOCK FOREVER
Fee burn30% DESTROYED (50% CONGESTED)
Developer tax0% CONSTITUTIONAL LOCK
Premine0 EVERY CYNC WAS MINED
Emission Curve — reward = max(0.6, (100M − mined) / 2M)
No halvings. No cliffs. Smooth asymptotic decay to 0.6 CYNC/block tail emission — sustaining miners forever while keeping supply capped at 100M.
Fee Distribution
NORMAL
CONGESTED
Burned CYNC is permanently destroyed — reducing effective supply over time.
§ 05
Written in stone.
The CoinCync Constitution is permanent. It cannot be amended, repealed, or superseded. These are not promises — they are protocol rules.
Article I — Fixed Supply
"The total supply of CYNC shall never exceed 100,000,000 coins. The network itself will reject any block that violates this formula."
Article III — Mandatory Privacy
"All transactions on CoinCync are private. There is no transparent mode. There is no opt-in privacy tier. Privacy is mandatory."
Article IX — No Surveillance
"The CoinCync protocol shall never include any feature whose primary purpose is to enable financial surveillance. Blacklists, chain analysis hooks, mandatory memos are permanently prohibited."
Article X — Immutability
"This Constitution is permanent. It cannot be amended. It cannot be repealed. It cannot be superseded by any governance process."
§ 06
Three commands to mine.
Build from source and mine your first block. Any CPU. No GPU required. No pool required.
# Clone and build (Rust 1.75+, ~3 min)
$ git clone https://github.com/CyncDevelopment/Cync-Protocol.git
$ cd Cync-Protocol
$ cargo build --release --features "randomx testnet"
Compiling coincync v1.0.1 — 520 tests pass
# Start a node
$ ./target/release/coincync-node --network testnet
Syncing... block 43891 of 43891 (100%)
# Mine on personal hardware (cloud VPS providers prohibit it)
$ ./target/release/coincync-tui-miner --testnet --address tCYNC3... --threads 4
Mining at 142 H/s — RandomX — 4 threads
$ git clone https://github.com/CyncDevelopment/Cync-Protocol.git
$ cd Cync-Protocol
$ cargo build --release --features "randomx testnet"
Compiling coincync v1.0.1 — 520 tests pass
# Start a node
$ ./target/release/coincync-node --network testnet
Syncing... block 43891 of 43891 (100%)
# Mine on personal hardware (cloud VPS providers prohibit it)
$ ./target/release/coincync-tui-miner --testnet --address tCYNC3... --threads 4
Mining at 142 H/s — RandomX — 4 threads
§ 07
Get started.
Two paths in. Pick the one that matches what you're trying to do.
For users
Send and receive CYNC
Install the wallet, fund it, send your first private transaction. About 5 minutes.
- Download the wallet — Windows installer, auto-syncs to testnet
- Create a wallet — 24-word seed, encrypted on disk
- Claim 10 tCYNC from the faucet — or mine your own with the wallet's built-in miner
- Send your first private transaction — ring-signed by default, no opt-in needed
For developers & operators
Build, run, integrate
Compile from source, run a full node, talk to it over JSON-RPC. About 30 minutes.
- Build from source — Rust toolchain,
cargo build --release - Run a node — 2GB RAM, 20GB disk, syncs in <1h on testnet
- Talk to it via JSON-RPC — 16 methods, curl-friendly examples
- Submit a CIP — propose changes, no permission required
Desktop Wallet
Windows installer. Auto-spawns a local node, generates an RPC key, and connects to testnet on first launch.
↓ Download Setup.exe
Start Mining
RandomX CPU-only. Any computer can mine. 50 CYNC per block at genesis.
→ Mining Guide
Run a Node
Strengthen the network. 2GB RAM, 20GB disk. Ubuntu, macOS, or Windows.
→ Node Guide
Build on CoinCync
JSON-RPC API. 16 methods. Full documentation with curl examples.
→ API Reference
§ 08
What's next.
A transparent roadmap for CoinCync development.
Phase 1 — Foundation
Core Protocol & Internal Testnet
RandomX CPU mining, CLSAG-16 ring signatures (ring size 11→16 bootstrap ramp at block 10,000), Bulletproofs+ range proofs, stealth addresses, Dandelion++ propagation, desktop wallet, block explorer, 5-node fleet across 3 continents.
Complete
Phase 2 — Privacy Innovations
7 Advanced Privacy Features
Decoy defense, encrypted memos, scoped view keys, deniable wallets, traffic shaping, dead man's switch, auto-churn. FROST multi-sig indistinguishable from single-sig.
Complete
Phase 3 — Constitutional Foundation
19 Articles & 15 Rights, Compile-Time Locked
Constitution + Bill of Rights with critical-files lockfile (SHA-256-protected) and 8 compile-time tripwire constants. Articles forbid the Terra-class failure modes (no algorithmic capture, no admin keys, no external trust, no surveillance layer, no fee redirects). CIP process documented; CIP-001 (atomic swap) and CIP-002 (cynchub) drafts published.
Complete
Phase 4 — Public Testnet
Open Network & Hardening
Public testnet launching week of 2026-05-09. Anyone can run a node, mine, transact, build wallets. 72-hour pre-launch soak, peer-quality scoring, smoke-test transaction flow. Third-party audit kickoff. Real-world reliability data feeds the mainnet decision.
In Progress
Phase 5 — Mainnet Prep
Atomic Swaps & Signed Releases
CIP-001 working CYNC↔BTC atomic swap implementation (mainnet launch blocker). Cryptographic review + bug-bounty round. Multi-maintainer signed-release infrastructure (M-of-N). Reproducible builds verified.
Planned
Phase 6 — Mainnet Genesis
October 1, 2026
Mainnet launch. Hardware wallet support. Mobile wallet beta. Direct integrations with privacy-friendly swap services (Cake Wallet, Haveno, ChangeNOW, FixedFloat) for trustless on/off ramps via atomic swaps.
Planned
Phase 7 — cynchub Liquidity Layer
CIP-002: PoW-Secured Cross-Chain Trading
12–24 months post-mainnet. Auxiliary PoW chain merge-mined with CoinCync, hosting an on-chain order book for trustless CYNC↔BTC↔stablecoin trading. Miners coordinate; HTLCs settle. The PoW alternative to PoS bridges — no multisig, no federation, no admin authority.
Future
Public CIP register · view all proposals →
Mainnet Genesis
October 1, 2026
00:00:00 UTC — the first block that can never be changed
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§ 09
Security & bug bounty.
We pay for vulnerabilities. Responsible disclosure protects everyone.
Critical
$5K–$50K
Supply inflation, chain split, privacy break, key extraction
High
$1K–$5K
Node crash, double-spend, key image bypass, consensus bypass
Medium
$100–$1K
Mempool manipulation, DoS vectors, privacy leak for specific users
Low
$50–$100
Minor info leak, non-consensus crash, documentation errors
Report to security@coincync.org — PGP: 2CAA 920F 8B96 1772 — 520+ tests in CI
§ 10
Frequently asked.
Is CoinCync a Monero fork?
No. CoinCync is written from scratch in Rust. It uses similar cryptographic primitives (CLSAG ring signatures, Pedersen commitments, Bulletproofs+, stealth addresses) because those are the strongest known tools for transaction privacy. But the codebase, consensus rules, emission curve, fee model, and Constitution are entirely original.
Can I mine on a laptop?
Yes. CoinCync uses RandomX, a CPU-only proof-of-work algorithm. GPUs and ASICs offer no advantage. Any modern CPU with 2GB of free RAM per thread can mine. At genesis, a laptop with 4 cores earns roughly 50 CYNC per block found.
How is supply auditable if amounts are hidden?
Pedersen commitments are additively homomorphic. This means you can verify that inputs equal outputs without knowing the actual amounts. Every node independently checks that no coins are created from nothing — the math balances without revealing any values. Combined with Bulletproofs+ range proofs (which prove amounts are non-negative), this guarantees no hidden inflation.
Why no GPU or ASIC mining?
RandomX is designed so that the most efficient hardware to execute it is a general-purpose CPU. An ASIC for RandomX would essentially be a CPU, offering no economic advantage. This keeps mining accessible to anyone with a computer and prevents the centralization that GPU farms and ASICs create in other networks.
What happens if I lose my keys?
Your funds are controlled by your 24-word seed phrase, encrypted with Argon2id + XChaCha20-Poly1305. If you lose both your seed phrase and your wallet file, the funds are permanently inaccessible. CoinCync includes a dead man's switch feature — time-locked recovery that can send funds to a backup address after a configurable period of inactivity.
Can I disclose transactions for tax or audit purposes?
Yes. Time-scoped view keys let you selectively reveal transactions within a specific block range to an auditor, exchange, or tax authority — without exposing your full history or breaking anyone else's privacy. You choose what to reveal and to whom.
When does mainnet launch?
October 1, 2026 at 00:00:00 UTC. The genesis message reads: "CoinCync Mainnet Genesis - Privacy You Can Audit - October 2026". Until then, the testnet is live with mining active. All testnet coins will be wiped at mainnet launch.
§ 11
Built on well-known primitives.
No homemade crypto. Every primitive in CoinCync is published, peer-reviewed, and well-documented. We stand on these shoulders.
Don't trust.
Verify.
Every CYNC in existence traces to the emission curve. The math can be checked by anyone, at any block, on their own node.