chain · quantum risk
Hedera Cryptography Profile (Quantum Risk)
Verdict
As a chain, Hedera should be modeled via its authorization cryptography—not market narratives. Hedera is not quantum-proof while accounts use classical Ed25519/ECDSA. Hashgraph consensus marketing does not replace PQC signatures.
Overview
Hedera (HBAR) is included in Wave 6a as a top-market-cap L1 / native smart-chain target. This page is the chain cryptography profile.
Hedera combines a hashgraph consensus narrative with account-based services (crypto, tokens, consensus service). User and service authorization still depends on classical public-key cryptography in standard deployments.
Enterprise adopters should inventory keys the same way they inventory cloud KMS and PKI—not assume the consensus story grants quantum immunity.
For the direct verdict hub see /is-quantum-proof/hedera. For holder framing see /crypto/hbar.
Cryptographic profile
What breaks
- Classical signatures authorizing HBAR value movement under Shor-class adversaries once public keys are known
- Custodial hot wallets and exchange operational keys
- Bridges or wrapped representations with concentrated signers (if used)
Mitigations
- Inventory every key that can move HBAR (self-custody, exchange, multisig)
- Prefer multiparty / hardware policies for treasuries
- Document bridges and wrapped asset paths
- Track ecosystem PQC research; do not assume branding equals deployment
- Use /assessment and chain comparison hubs on this site for program framing
FAQ
Is hashgraph quantum-proof?
Consensus data structure claims are not the same as post-quantum transaction signatures.
What should enterprises ask?
Which algorithms sign transactions today, and what is the PQC roadmap for SDKs and custody?
Key concepts (technical dictionary)
Terms used on this page — open a definition: