Guides
Post-Quantum Security Guides
Practical, in-depth guides on quantum threats to cryptocurrency, post-quantum cryptography standards, and quantum-safe blockchain architecture. Written for developers, researchers, and investors.
Post-Quantum Cryptography: A Complete Developer Guide for 2026
NIST PQC standards are final. Covers ML-DSA, SLH-DSA, ML-KEM selection, liboqs setup, hybrid migration, and an ECDSA vs ML-DSA comparison table for developers.
Bitcoin Quantum Risk Assessment: P2PK, P2PKH, and Taproot Exposure Ranked
Your Bitcoin quantum exposure depends on address type and transaction history. P2PK is maximally exposed. Taproot reveals your full public key in every output. This guide ranks every Bitcoin address type by quantum risk level and gives you a concrete action checklist.
Implementing NIST Post-Quantum Standards: FIPS 204, 205, and 206
Implement all three 2024 NIST PQC standards. Covers ML-DSA, SLH-DSA, ML-KEM selection, key sizes, hybrid strategies, and Python code samples using liboqs.
How to Choose a Quantum-Safe Cryptocurrency Wallet in 2026
Select a genuinely quantum-resistant wallet: what makes one quantum-safe, why most hardware wallets remain vulnerable, and what to look for in 2026.
Harvest Now, Decrypt Later: The Blockchain Threat Already Active
Harvest-now-decrypt-later applied to blockchain: data being collected today, nation-state evidence, highest-risk assets, and what structural immunity means.
Building on QuanChain: A Developer Quickstart Guide
Set up a QuanChain dev environment, generate ML-DSA key pairs, fund a testnet wallet, send quantum-safe transactions, and deploy your first smart contract.
Post-Quantum DeFi Security: Protecting Liquidity Pools and Smart Contracts
How quantum computing threatens DeFi: LP key theft, oracle compromise, and multisig attacks. Covers exposed components, migration paths, and QuanChain DeFi.
Quantum Computing Threat Timeline for Blockchain: Key Milestones Before Crypto Is at Risk
IBM Heron hit 99.9% gate fidelity in 2025. Google Willow crossed the below-threshold error rate. This timeline maps every milestone from 2021 to 2035 against the qubit counts needed to break Bitcoin and Ethereum, so you know exactly when the risk becomes real.
How to Evaluate Quantum-Resistant Blockchains: A Technical Checklist
Eight criteria for genuine quantum resistance: native PQC, key rotation, hash security, consensus safety, address reuse, NIST compliance, and HNDL protection.
Enterprise Quantum Security for Blockchain: Migration Playbook
Enterprise quantum migration: CBOM, risk prioritization, NIST timelines, hybrid deployment, and vendor evaluation for supply chain, finance, and healthcare.
CRYSTALS-Dilithium (ML-DSA) Signature Sizes: The Blockchain Throughput Problem
ML-DSA signatures are 2,420–4,595 bytes versus 64 bytes for ECDSA. This guide explains the throughput impact, the mitigation strategies, and how different blockchain architectures absorb the cost.
IBM Quantum Roadmap 2026: Fault-Tolerant Milestones and What They Mean for Bitcoin
IBM Heron R2 reached 99.9% two-qubit gate fidelity in 2025. The Starling and Blue Jay systems target fault-tolerant operation by 2029. This guide maps each IBM milestone against the qubit counts needed to break secp256k1 and gives a realistic threat timeline for Bitcoin and Ethereum holders.
Is Ed25519 Quantum Resistant? What Every Blockchain Developer Needs to Know
Ed25519 is not quantum resistant. It relies on the elliptic curve discrete logarithm problem, which Shor's algorithm solves in polynomial time on a fault-tolerant quantum computer. This guide explains the mechanics, which chains are affected, and what quantum-resistant alternatives look like.
How Many Qubits to Break Bitcoin secp256k1? 13 Million (1 Day) or 317 Million (1 Hour)
Webber et al. (2022) calculated that breaking Bitcoin's secp256k1 curve in one day requires 13 million physical qubits; in one hour, 317 million. Current processors have under 10,000. This guide explains the physical vs logical qubit gap, error correction overhead, and what the numbers mean for your timeline.
Bitcoin BIP 360: What P2QRH Means for Quantum-Resistant Bitcoin
BIP 360 proposes P2QRH (Pay to Quantum Resistant Hash) as a new Bitcoin address type supporting post-quantum signatures. This guide covers what the proposal contains, its current status, what it would protect, and what it leaves unresolved.
QRL vs Algorand: Quantum Resistance Compared
QRL uses XMSS signatures and is quantum resistant by design. Algorand uses Ed25519 and is not. This guide compares their cryptographic architectures, the trade-offs of each approach, and what the difference means for long-term asset security.
NSA CNSA 2.0 and Blockchain: What the 2033 Deadline Means for Enterprise Crypto Infrastructure
CNSA 2.0 sets mandatory post-quantum migration deadlines of 2030-2033 for US national security systems. This guide explains what algorithms are required, which timeline applies to blockchain, and how enterprise blockchain deployments achieve compliance.
Microsoft Majorana 1: What the Topological Qubit Announcement Means for Crypto
Microsoft announced Majorana 1 in February 2025, claiming the first topological qubits on a production chip. This guide explains what topological qubits are, the controversy around Microsoft's claims, and what Majorana 1 actually means for the quantum threat to Bitcoin, Ethereum, and post-quantum cryptography timelines.
Ethereum's Post-Quantum Roadmap: Where It Stands in 2026
Ethereum uses secp256k1 ECDSA for externally owned accounts and BLS12-381 for validators — both vulnerable to Shor's algorithm. This guide covers Ethereum's actual post-quantum roadmap in 2026, the EIP-7702 and ERC-4337 migration path, The Splurge phase, and the realistic timeline.
Is IOTA Quantum Resistant? The Tangle's Post-Quantum History Explained
IOTA was originally marketed as quantum resistant due to its use of Winternitz OTS signatures. IOTA 2.0 (Stardust) migrated to Ed25519 — which is not quantum resistant. This guide explains the history, the current cryptographic state of IOTA, and the common misconception about the Tangle.
Post-Quantum Key Management for Blockchain: The Complete 2026 Guide
Post-quantum key management for blockchain requires replacing elliptic-curve key generation, storage, and rotation with ML-DSA or SLH-DSA equivalents — and rethinking how public keys appear on-chain. This guide covers HD wallet migration, key rotation strategies, hardware wallet support, and the architectural difference between retrofitting PQC and building it from genesis.
Is Bitcoin Quantum Safe? The Honest 2026 Assessment
Bitcoin uses secp256k1 ECDSA — not quantum safe. This guide explains exactly which address types are vulnerable, what the realistic attack timeline looks like, what BIP 360 proposes, and what Bitcoin holders can do right now.
Is Solana Quantum Safe? What SOL Holders Need to Know
Solana uses Ed25519 for all wallet signatures — not quantum safe. This guide explains the exact vulnerability, the staking exposure problem, why Solana has no post-quantum roadmap in 2026, and what SOL holders can do.
Is Ethereum Quantum Safe? ETH Holders' Complete Guide for 2026
Ethereum uses secp256k1 ECDSA for user accounts and BLS12-381 for validators — neither is quantum safe. This guide covers the full exposure, the 2028-2030 migration timeline, and what ETH holders can do right now.
Is Cardano Quantum Resistant? Ed25519, UTXO Exposure, and IOG's PQ Roadmap
Cardano uses Ed25519 signatures for every transaction. Ed25519 is not quantum resistant. Here is what that means for ADA holders, stake pool operators, and the realistic timeline for Cardano's post-quantum migration.
How DeFi Protocols Can Protect Against Quantum Attacks: A Technical Roadmap
Most DeFi protocols are governed by secp256k1 or Ed25519 multisig keys that are already on-chain. This guide covers what the quantum attack surface looks like for DeFi and what protocol teams need to do before Q-Day.
Q-Day Cryptocurrency Timeline: When Quantum Computers Will Threaten Crypto
Q-Day is the moment a quantum computer first breaks real-world public-key cryptography. For cryptocurrency holders, it means secp256k1 and Ed25519 wallets become drainable. Here is what the current research says about when and what happens next.
Quantum Computing and NFT Security: What Happens to Your NFT When Quantum Computers Arrive
NFT ownership is secured by the same secp256k1 and Ed25519 keys that protect cryptocurrency. A quantum computer that can drain a Bitcoin wallet can also steal an NFT. Here is what the quantum threat looks like for NFTs and what a post-quantum NFT architecture requires.