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Aptos proposes post-quantum signatures to future-proof blockchain security
Aptos is entering the quantum race. On Thursday, the blockchain development company unveiled a proposal to implement post-quantum signatures, citing the long-term risks that advances in quantum computing could pose to existing cryptography.
While current cryptographic schemes remain secure against classical computers, researchers warn that sufficiently powerful quantum machines could eventually break them, potentially compromising account security retroactively.
Aptos—one of the largest Proof-of-Stake Layer 1 blockchains, primarily designed to support decentralized applications — has expressed its readiness to transition to post-quantum signatures well before they become critically necessary.
Preparedness means foresight
To this end, Aptos Labs introduced an Aptos Improvement Proposal, AIP-137, developed by its cryptography team, which would optionally add support for a post-quantum signature scheme at the account level.
“Quantum computing is no longer a distant threat. This matters for networks like Aptos because cryptographically relevant quantum computers (CRQCs) could render modern signature schemes forgeable, potentially breaking existing security models,” Aptos Labs said.
If approved by the community, AIP-137 would introduce SLH-DSA, a hash-based digital signature scheme standardized as FIPS 205, as an optional account signature type. This change would make Aptos one of the first blockchains to natively support post-quantum accounts.
Existing accounts would remain unchanged, while post-quantum accounts would be entirely opt-in, allowing users to adopt them selectively.
As we wrote, Solana tests post-quantum defenses as future risks loom
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