--- title: Chain profiles url: "https://hardyindex.com/chains" updated: 2026-08-12 chains: 23 --- # Chain profiles One profile per rated chain, grouped by readiness tier. Each carries the full score breakdown, a sourced roadmap, an exposure assessment and a direct answer. **As of 12 August 2026. 23 chains rated.** > This is a security-readiness assessment, not investment advice. ## Tier 1: Native Post-quantum secure at mainnet today, with quantum-resistant signatures built in from genesis. ### [Quantum Resistant Ledger (QRL)](https://hardyindex.com/chains/qrl) Hardy Score 92.0 of 100. Rank 1 of 23. The only chain in the index where a post-quantum signature is mandatory for every account on mainnet, and has been since 2018. ### [Abelian (ABEL)](https://hardyindex.com/chains/abelian) Hardy Score 84.5 of 100. Rank 2 of 23. A lattice-based privacy chain that has run post-quantum signatures and key encapsulation on mainnet since 2022, built on primitives inspired by CRYSTALS-Dilithium and Kyber. ## Tier 2: Shipping Post-quantum signature features are live on mainnet and a migration for existing holders is underway. ### [Nervos CKB (CKB)](https://hardyindex.com/chains/nervos-ckb) Hardy Score 75.5 of 100. Rank 3 of 23. An audited SPHINCS+ lock script is deployed on CKB mainnet, so users can hold funds under a NIST-standardised post-quantum signature today without a hard fork. ### [Algorand (ALGO)](https://hardyindex.com/chains/algorand) Hardy Score 74.5 of 100. Rank 4 of 23. Falcon-signed State Proofs have secured Algorand's history since 2022 and Falcon-signed transactions have run on mainnet since November 2025, with broad resilience targeted for end-2027. ### [Solana (SOL)](https://hardyindex.com/chains/solana) Hardy Score 54.5 of 100. Rank 5 of 23. A quantum-resistant Winternitz vault has run on Solana mainnet for over two years, but protocol-level migration to Falcon is explicitly conditional and carries no published dates. ## Tier 3: Committed A funded roadmap with public dates and active research exists, but no post-quantum signature is live on mainnet. ### [XRP Ledger (XRP)](https://hardyindex.com/chains/xrp-ledger) Hardy Score 46.5 of 100. Rank 6 of 23. A dated four-phase roadmap targets full post-quantum transition by 2028, with ML-DSA already deployed on AlphaNet and a Q-Day contingency plan defined. ### [Sui (SUI)](https://hardyindex.com/chains/sui) Hardy Score 45.5 of 100. Rank 7 of 23. Committed in August 2026 to two finalised NIST schemes, with a migration path that lets existing accounts move to quantum-safe keys without changing their addresses. ### [Hedera (HBAR)](https://hardyindex.com/chains/hedera) Hardy Score 42.0 of 100. Rank 8 of 23. Published a phased post-quantum migration roadmap in April 2026, targeting a new post-quantum key type for users in 2027 with existing keys continuing to work. ### [Stellar (XLM)](https://hardyindex.com/chains/stellar) Hardy Score 41.0 of 100. Rank 9 of 23. A published Quantum Preparedness Plan whose first stage adds ML-DSA verification to Soroban as native host functions, letting contract accounts authenticate with quantum-safe keys. ### [Zcash (ZEC)](https://hardyindex.com/chains/zcash) Hardy Score 41.0 of 100. Rank 10 of 23. Privacy is not quantum safety: Zcash spends are authorised by elliptic-curve signatures, though ZIP 2005 adds a quantum recovery path for shielded notes ahead of a full transition. ### [Aptos (APT)](https://hardyindex.com/chains/aptos) Hardy Score 40.5 of 100. Rank 11 of 23. Proposed SLH-DSA-SHA2-128s for transaction signatures as an opt-in scheme, accepting signatures 82 times larger than Ed25519 in exchange for minimal new security assumptions. ### [Polkadot (DOT)](https://hardyindex.com/chains/polkadot) Hardy Score 40.5 of 100. Rank 12 of 23. The Web3 Foundation published a post-quantum roadmap covering Polkadot and JAM, naming Dilithium for consensus signatures and Falcon for accounts. ### [Ethereum (ETH)](https://hardyindex.com/chains/ethereum) Hardy Score 40.0 of 100. Rank 13 of 23. A dedicated Ethereum Foundation post-quantum team formed in January 2026, with hash-based validator signatures in weekly devnets and core infrastructure targeted for around 2029. ### [Cardano (ADA)](https://hardyindex.com/chains/cardano) Hardy Score 37.5 of 100. Rank 14 of 23. Cardano Vision 2026 makes post-quantum security one of three strategic pillars, with named research deliverables running from primitive assessment to a published migration SIP. ## Tier 4: Debating The threat is acknowledged and proposals exist, but there is no consensus and no published timeline. ### [BNB Chain (BNB)](https://hardyindex.com/chains/bnb-chain) Hardy Score 22.5 of 100. Rank 15 of 23. Tested ML-DSA-44 signatures on its own network and published the cost honestly: throughput fell around 40 per cent and blocks grew nearly eighteenfold. ### [IOTA (IOTA)](https://hardyindex.com/chains/iota) Hardy Score 21.0 of 100. Rank 16 of 23. Widely described as quantum-resistant on the strength of a scheme it removed in 2021; IOTA's layer 1 has signed with Ed25519 since Chrysalis and post-quantum support exists only in IOTA Identity. ### [Tron (TRX)](https://hardyindex.com/chains/tron) Hardy Score 18.5 of 100. Rank 17 of 23. Signs with ECDSA on secp256k1 and has announced an intention to deploy NIST post-quantum signatures on mainnet, but we could not confirm dated milestones from a primary source. ### [Bitcoin (BTC)](https://hardyindex.com/chains/bitcoin) Hardy Score 17.0 of 100. Rank 18 of 23. Two post-quantum BIPs reached Draft status in February 2026, but neither introduces a post-quantum signature, no activation path is agreed, and roughly a third of supply sits in addresses with exposed public keys. ## Tier 5: Exposed The signatures securing funds on mainnet today are quantum-vulnerable, and no public post-quantum plan, proposal or research programme could be found. ### [TON (TON)](https://hardyindex.com/chains/toncoin) Hardy Score 13.0 of 100. Rank 19 of 23. Signs with Ed25519 and has no published post-quantum roadmap, though its wallet-as-smart-contract model means a new signature scheme could be adopted without changing the protocol. ### [Litecoin (LTC)](https://hardyindex.com/chains/litecoin) Hardy Score 12.5 of 100. Rank 20 of 23. A Bitcoin-derived chain using ECDSA on secp256k1 with no published post-quantum roadmap, though its MWEB soft fork proves it can enact consensus changes Bitcoin has not managed. ### [Dogecoin (DOGE)](https://hardyindex.com/chains/dogecoin) Hardy Score 11.0 of 100. Rank 21 of 23. A Bitcoin-derived chain using ECDSA on secp256k1, with no published post-quantum roadmap and the same governance difficulty Bitcoin faces without the same research effort. ### [Avalanche (AVAX)](https://hardyindex.com/chains/avalanche) Hardy Score 10.5 of 100. Rank 22 of 23. Signs with ECDSA on secp256k1 across its chains, with no published post-quantum roadmap found at the time of writing. ### [Hyperliquid (HYPE)](https://hardyindex.com/chains/hyperliquid) Hardy Score 7.0 of 100. Rank 23 of 23. Authenticates with ECDSA on secp256k1 through EIP-712 typed-data signing, with no published post-quantum roadmap found despite very large open interest. --- The ranked table of all 23 chains is at https://hardyindex.com/index.md. The rubric is at https://hardyindex.com/methodology.md.