Blockchain networks intensified their preparations for the post-quantum era on October 8, 2026, with Solana Foundation and Cosmos Labs each detailing cryptographic security roadmaps.
Solana Foundation’s VP of Technology, Jacob Creech, addressed rising concerns around quantum computing and blockchain cryptography by stating users do not need to enter bunker mode. While a theoretical break of Solana’s Ed25519 cryptography could expose derived keys, the actual secret seed would remain protected. The foundation said it has a defined path forward involving network upgrades that would allow users to verify seed knowledge and transition to more secure signature schemes, with a working proof of concept already in place.
Meanwhile, Cosmos Labs deployed Ledger Security 2026.1, its first native post-quantum secure key option for the Cosmos stack. The suite integrates ML-DSA signature algorithms standardized under FIPS 204 and spans Cosmos SDK v0.55.0, CometBFT v0.40.0, a Proof-of-Authority module v1.1.0, and the cosmos/kms v0.1.0 management tool. A Cosmos-based ledger reaches a post-quantum security profile once validators holding at least 66.7% of total voting power rotate their keys to ML-DSA.
Cosmos Labs noted that ML-DSA keys have a larger payload footprint than legacy ed25519 formats, which may create bandwidth overhead on high-throughput networks, though managed enterprise test environments have shown manageable impacts. The upgrade also introduces zero-downtime key rotation and administrative modules for permissioned networks. To coordinate migration, the previous TMKMS key management tool will be sunset from the official Bug Bounty Program at the start of Q1 2027.
The parallel moves reflect broader quantum-security momentum across decentralized infrastructure, including recent post-quantum and zero-knowledge developments from projects such as LayerZero and hardware compatibility efforts from Ledger.
