Qbit: Post-quantum peer to peer digital value<br>Skip to contentTestnet is live, download the Qbit client and join the public network

Post-quantum peer to peer digital value<br>Crypto is vulnerable to quantum theft, but it doesn't have to be. For the first time, digital value can be secured natively with quantum-resistant signatures from block zero.<br>Testnet now available<br>Run Qbit CoreRun Mining Pool<br>Read White Paper

PERMISSIONLESS<br>Native SHA-256

AUXPOW SHA-256<br>Secured by Bitcoin

QBIT CHAIN<br>Merge-Mined, Quantum-Secure

PERMISSIONLESS<br>Native SHA-256

AUXPOW SHA-256<br>Secured by Bitcoin

QBIT CHAIN<br>Merge-Mined, Quantum-Secure

Today's dominant chains were designed before quantum attacks were credible.<br>Even with upgrades, they require user action to secure wallets, leaving large amounts of inactive supply vulnerable.

Qbit solves this.<br>QBT is quantum-secure from inception and built to be the most durable digital store of value: no premine, 100% community distribution, and Bitcoin-backed security.

Decentralized, Community-Led.<br>Fair Proof-of-Work<br>QBT has a fixed 210,000,000 supply cap, mining-only distribution, no premine , and no outside token allocation. Initial difficulty is calibrated so the implied fully diluted cost of producing QBT is $100M, minimizing instamine risk.

SUPPLY CAP<br>210M QBT

Initial Production Cost<br>$100M

Bitcoin Secured<br>Qbit combines permissionless SHA-256 mining with AuxPoW merge mining, allowing Bitcoin hashrate to secure the chain. The AuxPoW launch difficulty is calibrated to equal 1% of Bitcoin’s hashrate, reducing instamine risk from a single miner or pool.

Launch Hashrate<br>1% BTC

MERGE-MINED BLOCKS<br>20%

Secure Self-Custody<br>Qbit is secured with quantum-resistant P2MR addresses that keep public spend keys hidden until use. When funds are spent, hash-based signatures authorize the transaction through a quantum-resistant spend path.

PRE-SPEND KEY EXPOSURE<br>Zero

LEGACY KEY EXPOSURE<br>Zero

A longer horizon for digital value.<br>Durable value cannot rely on aging assumptions.<br>Retrofitting turns security into a race across wallets, exchanges, custodians, miners, and users. Some funds move late, and some may never move.Qbit treats post-quantum security as a starting condition, not a future migration plan.

01<br>Long-lived ownership<br>Digital value only works if the ownership model is built to last forever.

02<br>Room to evolve safely<br>Standard spends stay focused on the post-quantum transaction model, with reserved paths for future soft-fork upgrades as signature technology improves.

03<br>A post-quantum path for Bitcoin hashrate<br>Qbit gives SHA-256 miners, pools, and ASIC infrastructure a long-term quantum-resistant blockchain to secure using the stack they already run.

Stateless hash-based signatures.<br>SIGNATURE ALGORITHM<br>SLH-DSA-SHA2-128s-bounded30

SIGNATURE FAMILY<br>SLH-DSA / SPHINCS+

SIGNATURE SIZE<br>3,680 bytes

Run Qbit Testnet<br>Start a public testnet4 node with Qbit Core, or bootstrap an operator mining pool from the Qbit mining repository.<br>Run Qbit CoreRun Mining Pool<br>Read White Paper

© 2026 Qbit Core contributors •contact@qbit.org<br>Qbit is released under the MIT License.