Quantum

Algorand

Falcon

<p><a href="https://x.com/Algorand" rel="noopener noreferrer nofollow">@Algorand</a> says it has processed roughly 1.7 million post-quantum transactions on mainnet since <a href="https://x.com/Google" rel="noopener noreferrer nofollow">@Google</a> published its widely discussed research on quantum threats to cryptocurrencies, as the network pushes its early start on quantum-resistant security as a competitive edge for <a href="https://x.com/search?q=%24ALGO&amp;src=cashtag_click" rel="noopener noreferrer nofollow">$ALGO</a>.</p>
<p>The figure is a company claim and has shifted in recent weeks. Algorand's own posts earlier this week cited <cite>over 1.5 million PQ-signed transactions</cite>, and secondary coverage has since reported <cite>more than 2.7 million</cite>. The numbers have not been independently audited in the sources reviewed.</p>
<h2 id="what-google-s-paper-changed">What Google's paper changed</h2>
<p>The research behind the debate was published on March 30 by Google Quantum AI. <cite>It concluded that breaking the 256-bit elliptic curve problem underpinning Bitcoin and Ethereum transaction signatures would require fewer than 500,000 physical qubits, roughly a 20-fold reduction from earlier estimates.</cite> The authors stressed that such attacks are not yet feasible. <cite>They state that while quantum attacks are not yet feasible, the findings increase urgency for moving to post-quantum cryptography.</cite></p>
<p>The paper also pointed to chains already working on the problem. According to a market report, <cite>it said Algorand had already deployed Falcon digital signatures for smart transactions and state proofs and had executed its first post-quantum-secured transaction in 2025.</cite> The same report noted that <cite>the paper did not say Algorand is fully quantum-secure today</cite>, only that it had implemented features to support future migration.</p>
<h2 id="how-algorand-s-approach-works">How Algorand's approach works</h2>
<p>Algorand's technical documentation says <cite>the Algorand Foundation protocol team executed the first post-quantum transaction on the network using the Falcon signature scheme on mainnet.</cite> The chain's history is also protected: <cite>Falcon-1024 signatures generate state proofs every 256 rounds, making the ledger itself quantum-secure.</cite> That is only part of the picture, however. Algorand's own write-up says the hardest remaining step <cite>requires research into a post-quantum replacement for the Verifiable Random Function at the heart of its Pure Proof-of-Stake protocol.</cite></p>
<p>There are trade-offs. <cite>Falcon signatures are approximately 10 times larger than Ed25519's 64-byte signatures</cite>, which <cite>affects message propagation, storage requirements, and verification costs.</cite></p>
<p>Other networks are also preparing. One analysis noted that <cite>the Ethereum Foundation launched a dedicated post-quantum team, a four-year upgrade roadmap, and a central hub at pq.ethereum.org.</cite> It also described <a href="https://x.com/Starknet" rel="noopener noreferrer nofollow">@Starknet</a> as using hash-based cryptography that is <cite>considered quantum-resistant today.</cite> Algorand's transaction count, if it holds, shows live usage rather than roadmaps, though the volume does not settle how the wider industry will migrate.</p>
<p><strong>Sources</strong></p>
<ul>
 <li><a href="https://algorand.co/blog/technical-brief-quantum-resistant-transactions-on-algorand-with-falcon-signatures" rel="noopener noreferrer nofollow">Algorand technical brief on Falcon-signed transactions</a></li>
 <li><a href="https://thequantuminsider.com/2026/03/31/google-suggests-quantum-attacks-on-cryptocurrency-encryption-may-require-fewer-resources/" rel="noopener noreferrer nofollow">The Quantum Insider on Google's quantum paper</a></li>
 <li><a href="https://thedefiant.io/news/research-and-opinion/google-quantum-ai-paper-rewrites-threat-timeline-for-bitcoin-ethereum-security" rel="noopener noreferrer nofollow">The Defiant on the Google Quantum AI whitepaper</a></li>
</ul>

Algorand is flexing its post-quantum dominance

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