A leading cryptographer, Kostas Chalkias, has issued a stark warning that the cryptocurrency industry is underestimating the disruptive potential of quantum computing on blockchain security. He argues that this is not a distant, abstract concern but a structural problem embedded in the design of early blockchains like Bitcoin.
Bitcoin is identified as the most exposed major blockchain due to its reliance on ECDSA signatures and the fact that many early Bitcoin addresses, including those believed to belong to Satoshi Nakamoto, have already revealed their public keys on-chain. This exposure makes them uniquely vulnerable once quantum computers reach a sufficient threshold, as attackers could exploit the already-visible cryptographic material without needing new transactions.
Chalkias emphasizes that the timeline for this threat is uncertain and potentially accelerating due to advances in artificial intelligence, compressing what was once thought to be a decades-away problem. He notes that governments and standards bodies like NIST are already pushing for the adoption of post-quantum cryptography.
In contrast, the Sui blockchain is positioned as more adaptable. Designed with cryptographic agility, Sui uses EdDSA signatures and has developed a mechanism, via Mysten Labs, that allows existing addresses to transition to quantum-resistant security through a single action using post-quantum zero-knowledge proofs. Chalkias states this approach cannot be retrofitted onto chains like Ethereum or Solana due to architectural constraints.
Simultaneously, Sui is undergoing a strategic shift, moving beyond its "Solana killer" label by rolling out protocol-level privacy. This new architecture uses zero-knowledge proofs to enable "Confidential DeFi," where transaction details can remain hidden from the public while remaining verifiable for compliance. This privacy is baked directly into the protocol, not added as a later feature, making it more robust and appealing for institutional adoption.
This shift coincides with growing institutional interest, with Sui reportedly seeing around $5.7 million in weekly institutional inflows this month. The network is also introducing the S2 StackStack to simplify development workflows, aiming to make its advanced features practical and accessible.
From a market perspective, SUI's price has stabilized near $1.49 after a sharp correction from highs above $2.00. Momentum indicators like the RSI and MACD suggest selling pressure may be easing, with the price searching for a base between key support at $1.45–$1.40 and resistance near $1.60.
