Transfer
Send Bitcoin through the bridge to your cBTC address
01 cBTC · Quantum-safe Bitcoin
cBTC — Quantum-Safe Copy of the Bitcoin Ledger
Bitcoin is already trading at a 20% quantum discount. Bitcoin Core has no code and no timeline. cBTC is the first purpose-built answer: 1:1 backing on a post-quantum blockchain, full reversibility, on-chain auditable.
02 Threat
Quantum Risk — No Longer a Discussion, but a Movement of Capital
The largest asset managers are not debating quantum risk — they are already acting on it:
20% Bitcoin quantum discount today Capriole Research, Feb 2026
58% projected discount by 2028 Capriole Research
$470B+ in vulnerable Bitcoin (exposed public keys) Project Eleven, Bitcoin Risq List
2–8 yrs ECDSA threat horizon (Q-Day 2028–2034) Aggregated expert estimates
"We will walk away from Bitcoin if the thesis is fundamentally broken"
— Van Eck (Nov 2025)
Added quantum computing to Bitcoin ETF risk disclosures
— BlackRock (May 2025)
Dropped Bitcoin allocation by 10%, shifted to gold
— Jefferies (Jan 2026)
"Quantum concerns keeping institutional allocations at 3%"
— Kevin O'Leary (Feb 2026)
Mentions of organizations reflect their public statements and market context — not partnership or endorsement.
The question from LPs is already here. "What are you doing about quantum risk in your Bitcoin portfolio?" Compliance teams are already including it in reporting. The question isn't whether this conversation will reach you — it's whether you're ready for it.
03 What Is cBTC
What Is cBTC
Same Coins. Same Amount. Different Cryptography.
Backing
Your Bitcoin enters a distributed pool controlled by an independent guardian set with threshold MPC signing. No single custodian
Receive
Get cBTC 1:1, protected by post-quantum cryptography (NIST-standardized and NIST-track algorithms)
Four principles
01
1:1 — always
Every cBTC is backed by real Bitcoin in the pool. Verifiable on-chain at any time
02
No single point of failure
The pool is distributed across independent vaults, secured by validators
03
Reversibility
Two-way bridge: return to classical Bitcoin whenever you want
04
Transparency
Backing, bridge, operations — all auditable on-chain in real time
04 Audience
Who It's For
Asset Managers
A 20% quantum discount is already portfolio drag. It's in your SEC filings, your ETF prospectuses, your LP conversations. And it's growing.
cBTC is built to be the first post-quantum Bitcoin instrument with 1:1 backing. It gives a concrete answer to "what are you doing about quantum risk?" — with full optionality: exit to classical Bitcoin, migrate to future PQ-Bitcoin, or maintain your cBTC position.
Custodians
Your clients are already asking. No custody solution for post-quantum Bitcoin exists — yet.
cBTC is built on NIST-standardized algorithms with native key management: per-address algorithm selection, hot-swappable cryptography without hard fork, on-chain auditable trail for every operation. Integration via Cellframe SDK.
Funds and Treasuries
Bitcoin's quantum discount — 20% today, projected 58% by 2028. This is not a theoretical risk but real drag on every position. Until now, no hedging instrument existed.
cBTC delivers 1:1 Bitcoin exposure on a post-quantum chain with distributed custody, native DEX trading, vaults, and treasury tooling. Three exits: stay in cBTC, return to Bitcoin, or migrate to PQ-Bitcoin.
05 Comparison
cBTC vs wBTC vs Bitcoin Core
Not a fork. Not a wrapper. A copy of the ledger with next-generation protection.
01 · PRIMARY cBTC
- Quantum protection
- NIST-standard (Dilithium, SPHINCS+) + FALCON (standardization finalizing)
- Time to protection
- 6–8 months to mainnet
- Custody model
- Distributed pool, guardian set with threshold MPC signing. No single custodian
- Algorithm agility
- Hot-swappable, no hard fork
- PQC performance impact
- 0% — native PQ architecture
- Native utility
- Wallet, DEX, vaults, smart contracts
- Reversibility
- Two-way bridge between Bitcoin and cBTC
02 · ALT wBTC
- Quantum protection
- None — same vulnerable keys
- Time to protection
- Never
- Custody model
- Single custodian, single point of failure
- Algorithm agility
- None
- PQC performance impact
- N/A
- Native utility
- DeFi on EVM chains
- Reversibility
- Custodian-dependent
03 · CANONICAL Bitcoin Core
- Quantum protection
- BIP-360 — draft, no code
- Time to protection
- 2–3 years (optimistic)
- Custody model
- N/A
- Algorithm agility
- Hard fork for every change
- PQC performance impact
- 60–70% throughput loss (estimated)
- Native utility
- Minimal
- Reversibility
- N/A
06 Technology
Cellframe Technology
A production blockchain, running since 2021. Built from scratch for post-quantum cryptography, not retrofitted from existing code.
Post-quantum cryptography — CRYSTALS-Dilithium (ML-DSA-65) and SPHINCS+-256f (both NIST-standardized), FALCON-512 (FN-DSA, standardization finalizing). Three security levels for different use cases
Algorithm agility — cryptographic primitives can be replaced without hard fork and without user-side updates. If Dilithium is compromised, switch to SPHINCS+ in a single transaction
Scalable architecture — two-level sharding: first level in production, second nearing completion. Horizontal scaling without PQC signature degradation
Native smart contracts — UTXO-based model with conditional transactions. Lightweight, auditable on-chain logic with a smaller attack surface than EVM alternatives
Zero PQC degradation — other blockchains lose 60–90% throughput when integrating post-quantum cryptography (Solana: −90% in Project Eleven tests, April 2026; Bitcoin: estimated −60–70% for permissionless networks, JBBA 2026). Cellframe runs at full speed because it was designed for PQ from inception
07 Either way
Two Scenarios — You Win in Both
SCENARIO A
Bitcoin doesn't upgrade in time?
cBTC is the fastest path to managing quantum risk: mainnet in 6–8 months while Bitcoin Core remains at draft stage. With growing adoption — a candidate for the canonical post-quantum version of Bitcoin.
SCENARIO B
Bitcoin does upgrade?
Then PQC integration will drop its throughput by 60–70% and push fees up 2–3×. Cellframe, designed for PQ from inception, keeps full speed — and becomes the natural high-performance Layer 2 for Bitcoin liquidity.
Either way, you're on the right side. Cellframe's structural advantage does not depend on Bitcoin Core's decisions.
08 Plan
Development Plan
Specific milestones. Verifiable results.
01
Month 3–4 Testnet + Bitcoin-to-cBTC bridge Working prototype, bridge testing
02
Month 4–5 Independent security audit Published report on cryptography and bridge
03
Month 6–8 Mainnet: Bitcoin deposit via bridge Product launch
04
Month 6–12 Native utility: DEX and vaults cBTC as a fully operational asset
05
Next phase Two-way bridge cBTC-to-Bitcoin Direct reverse exchange
09 Now
The Window Is Open — But Not Forever
20% discount today. Projected 58% by 2028.
- Institutions are already cutting Bitcoin allocations. Bitcoin Core — no code, no timeline, no key PQ advocates remaining
- The "quantum-safe Bitcoin" category is still unclaimed
- Federal deadline NSM-10 (April 2026) is pushing the entire financial system toward PQC migration
- Every month of Bitcoin Core delay is a month of advantage for those who act now
10 FAQ
FAQ
Is this a Bitcoin fork?
No. cBTC is a separate instrument on Cellframe's post-quantum blockchain. You transfer Bitcoin through the bridge and receive a quantum-safe asset 1:1 with full backing. No competing chain.
Why is this needed if Bitcoin can upgrade?
Even the optimistic upgrade timeline is 2–3 years. And PQC integration will degrade Bitcoin's performance by 60–70%. cBTC manages quantum risk now and remains useful as a high-performance Layer 2 after the upgrade.
What is the custody model?
The bridge runs on a distributed guardian set — independent operators with threshold MPC signing (5-of-8, then 10-of-15). Pool funds are split across independent vaults with velocity limits. Compromise of one segment does not affect the rest. 1:1 backing is verifiable on-chain.
Can I return to classical Bitcoin?
Yes. The two-way bridge between cBTC and Bitcoin is the next phase after mainnet. Full reversibility is a core design principle.
What is the timeline?
Testnet with bridge — month 3–4. Independent audit — month 4–5. Mainnet — month 6–8.
11 Document
Technical Documentation
Architecture, the bridge-and-backing model, post-quantum cryptography — no fluff, no marketing.
Read the Technical Documentation →12 Act
LPs are already asking. Compliance is already reporting. Do you have an answer?
13 For holders
For Bitcoin Holders
Your Coins. New Protection.
- Transfer Bitcoin through the bridge
- Your coins enter a secured pool controlled by independent bridge operators
- Receive the same amount of cBTC — same coins, but with next-generation cryptography
Every cBTC is backed by real Bitcoin 1:1. Want to go back — the bridge works both ways.