Hedera Hashgraph (HBAR) is designed to be resistant to quantum attacks, although it is not yet completely “quantum-proof”.
Why is Hedera more secure against quantum computing?
1️⃣ Using the Ed25519 signature algorithm
• This elliptic algorithm is more resistant to quantum attacks than the classic ECDSA used by Bitcoin and Ethereum.
• It reduces the risk of private keys being compromised by quantum computers.
2️⃣ Planned update to post-quantum signatures
• Hedera plans to implement signatures that are resistant to quantum attacks, including lattice-based signature schemes (such as CRYSTALS-DILITHIUM).
• This would further increase its resilience against future advances in quantum computing.
3️⃣ Consensus ABFT (Asynchronous Byzantine Fault Tolerance)
• The Hashgraph consensus protocol used by Hedera is not based on Proof of Work (PoW), which makes it less vulnerable to quantum attacks compared to classic blockchains.
• Its centralized governance system (via the Hedera Council) allows for rapid upgrades to quantum-resistant algorithms if needed.
4️⃣ Possible transition to post-quantum algorithms
• Hedera is closely following research into post-quantum cryptography and may adopt solutions developed by NIST (National Institute of Standards and Technology) as soon as they are ready.
Is Hedera Fully “Quantum-Proof”?
🔹 Not yet, but it is better prepared than Bitcoin or Ethereum, thanks to its Ed25519 algorithm and its scalable system.
🔹 Upgrades to post-quantum cryptosystems are planned, ensuring a smooth transition when the threat becomes more concrete.
💡 Conclusion: Hedera is one of the most advanced distributed ledgers in terms of protection against quantum threats. It is not yet 100% invulnerable, but it is designed to evolve rapidly as soon as quantum attacks become a reality. 🚀