{"id":511896,"date":"2025-12-25T23:30:25","date_gmt":"2025-12-25T23:30:25","guid":{"rendered":"https:\/\/cryptoslate.com\/?p=511896"},"modified":"2025-12-26T00:11:54","modified_gmt":"2025-12-26T00:11:54","slug":"xrpl-flips-to-quantum-safe-signatures-2420-byte-proofs-replace-elliptic-curves","status":"publish","type":"post","link":"https:\/\/cryptoslate.com\/xrpl-flips-to-quantum-safe-signatures-2420-byte-proofs-replace-elliptic-curves\/","title":{"rendered":"XRPL flips to quantum-safe signatures; 2,420-byte proofs replace elliptic curves"},"content":{"rendered":"<p>The <a href=\"https:\/\/cryptoslate.com\/coins\/xrp\/\">XRP<\/a> Ledger (XRPL) is ending the year with major technological developments after a year that saw it gain significant adoption and milestones.<\/p>\n<p>On Dec. 24, Denis Angell, a lead software engineer at XRPL Labs, <a href=\"https:\/\/x.com\/angell_denis\/status\/2003657560176373837\">announced<\/a> the integration of &#8220;post-quantum&#8221; cryptography and native smart contracts into AlphaNet, the project\u2019s public developer network.<\/p>\n<h2>The &#8216;Q-Day' inevitability<\/h2>\n<p>Most blockchain networks, including <a href=\"https:\/\/cryptoslate.com\/coins\/bitcoin\/\">Bitcoin<\/a> and <a href=\"https:\/\/cryptoslate.com\/coins\/ethereum\/\">Ethereum<\/a>, secure user funds using Elliptic Curve Cryptography (ECC).<\/p>\n<p>This math works because current computers find it impossibly difficult to reverse the calculation and derive a private key from a public one. However, this security model relies on the limitations of classical physics.<\/p>\n<p><a href=\"https:\/\/cryptoslate.com\/bitcoin-encryption-isnt-at-risk-from-quantum-computers-for-one-simple-reason-it-doesnt-actually-exist\/\">Quantum computers<\/a> operate differently. They utilize qubits to perform calculations in multiple states simultaneously. Experts predict that a sufficiently powerful quantum machine running Shor\u2019s algorithm will eventually solve ECC problems in seconds. Security agencies refer to this moment as &#8220;Q-Day.&#8221;<\/p>\n\n<div class=\"cs-article-embed\">\n    <a href=\"https:\/\/cryptoslate.com\/bitcoin-encryption-isnt-at-risk-from-quantum-computers-for-one-simple-reason-it-doesnt-actually-exist\/\" class=\"cs-article-embed__link\">\n                    <div class=\"cs-article-embed__media\">\n                <img src=\"https:\/\/cryptoslate.com\/wp-content\/uploads\/2025\/12\/bitcoin-quantum--1024x538.jpg\" alt=\"Bitcoin encryption isn\u2019t at risk from quantum computers for one simple reason: it doesn\u2019t actually exist\" loading=\"lazy\" decoding=\"async\">\n            <\/div>\n                <div class=\"cs-article-embed__body\">\n            <span class=\"cs-article-embed__related-reading\">Related Reading<\/span>\n            <h3 class=\"cs-article-embed__title\">Bitcoin encryption isn\u2019t at risk from quantum computers for one simple reason: it doesn\u2019t actually exist<\/h3>\n                            <p class=\"cs-article-embed__summary\">There are no secret messages on the blockchain to decrypt. The real threat is Shor\u2019s algorithm forging signatures on keys you\u2019ve already revealed.<\/p>\n                                        <div class=\"cs-article-embed__meta\">\n                                            <span class=\"cs-article-embed__meta-item\">Dec 19, 2025<\/span>\n                                                                <span class=\"cs-article-embed__meta-divider\">&middot;<\/span>\n                                                                <span class=\"cs-article-embed__meta-item\">Liam &#039;Akiba&#039; Wright<\/span>\n                                    <\/div>\n                    <\/div>\n    <\/a>\n<\/div>\n\n<p>The AlphaNet update directly targets this vulnerability. Angell confirmed that the network now runs on CRYSTALS-Dilithium.<\/p>\n<p>Notably, the National Institute of Standards and Technology (NIST) recently standardized this algorithm, now known as ML-DSA, as the primary shield against quantum attacks.<\/p>\n<p>By weaving Dilithium into the testnet's fabric, XRPL Labs effectively vaccinated the ledger against future hardware breakthroughs.<\/p>\n<h2>Deconstructing the upgrade<\/h2>\n<p>According to Angell, the integration touches every vital organ of the XRPL anatomy. He described a comprehensive overhaul that introduces Quantum Accounts, Quantum Transactions, and Quantum Consensus.<\/p>\n<p>Quantum Accounts change how users establish identity. On the legacy network, the relationship between a private and public key rests on elliptic curves.<\/p>\n<p>On the upgraded AlphaNet, this relationship rests on lattice-based mathematics. A user generates a Dilithium key pair. This structure creates a mathematical maze that frustrates both classical and quantum solvers.<\/p>\n<p>So, even if an attacker possesses functional quantum hardware, they cannot find the path back to the private key.<\/p>\n<p>Meanwhile, Quantum Transactions secures the movement of funds. Every time a user sends XRP or another token, they sign it with a digital signature. This signature acts as the seal on the message.<\/p>\n<p>The new protocol mandates that these signatures utilize Dilithium. This ensures that no machine can forge a user\u2019s approval.<\/p>\n<p>Quantum Consensus protects the network\u2019s truth. Validators, which are the servers that agree on transaction ordering, must also speak this new language.<\/p>\n<p>If validators continued to use weak cryptography, a <a href=\"https:\/\/cryptoslate.com\/can-googles-13000x-quantum-echoes-put-bitcoins-keys-on-a-clock\/\">quantum attacker<\/a> could impersonate them, hijack their votes, and rewrite the ledger\u2019s recent history.<\/p>\n\n<div class=\"cs-article-embed\">\n    <a href=\"https:\/\/cryptoslate.com\/can-googles-13000x-quantum-echoes-put-bitcoins-keys-on-a-clock\/\" class=\"cs-article-embed__link\">\n                    <div class=\"cs-article-embed__media\">\n                <img src=\"https:\/\/cryptoslate.com\/wp-content\/uploads\/2025\/10\/google-willow-bitcoin-1024x538.jpg\" alt=\"Can Google\u2019s 13,000\u00d7 &#8220;quantum echoes&#8221; put Bitcoin\u2019s keys on a clock?\" loading=\"lazy\" decoding=\"async\">\n            <\/div>\n                <div class=\"cs-article-embed__body\">\n            <span class=\"cs-article-embed__related-reading\">Related Reading<\/span>\n            <h3 class=\"cs-article-embed__title\">Can Google\u2019s 13,000\u00d7 &#8220;quantum echoes&#8221; put Bitcoin\u2019s keys on a clock?<\/h3>\n                            <p class=\"cs-article-embed__summary\">Google\u2019s Willow chip earned verifiable quantum advantage this week; here\u2019s what that does, and doesn\u2019t, mean for ECDSA, SHA-256, and coins with revealed public keys.<\/p>\n                                        <div class=\"cs-article-embed__meta\">\n                                            <span class=\"cs-article-embed__meta-item\">Oct 23, 2025<\/span>\n                                                                <span class=\"cs-article-embed__meta-divider\">&middot;<\/span>\n                                                                <span class=\"cs-article-embed__meta-item\">Oluwapelumi Adejumo<\/span>\n                                    <\/div>\n                    <\/div>\n    <\/a>\n<\/div>\n\n<p>Essentially, the update forces the entire validator set to communicate via quantum-secure channels.<\/p>\n<h2>Engineering trade-offs<\/h2>\n<p>However, this shift to quantum resistance imposes distinct operational costs.<\/p>\n<p>Dilithium signatures require significantly more storage space than standard ECDSA signatures. An ECDSA signature occupies 64 bytes; a Dilithium signature requires approximately 2,420 bytes.<\/p>\n<p>This increase impacts network performance. Validators must propagate larger data blocks, which consumes more bandwidth and increases latency. The ledger history grows rapidly, increasing storage costs for node operators.<\/p>\n<p>The AlphaNet pilot is designed to generate data on these trade-offs. So, the network engineers will determine whether the blockchain can maintain its transaction throughput under the increased data load.<\/p>\n<p>If the ledger bloats, it raises the barrier to entry for independent validators, potentially centralizing the network topology.<\/p>\n<h2>Closing the programmability gap<\/h2>\n<p>Beyond security, the new update also addresses a critical competitive failure within the blockchain network.<\/p>\n<p>Smart contracts fill the programmability gap that has held back the XRPL for years. The network handled payments efficiently but could not host the applications that pulled developers and liquidity toward Ethereum and <a href=\"https:\/\/cryptoslate.com\/coins\/solana\/\">Solana<\/a>.<\/p>\n<p>Those ecosystems grew because they allowed markets, lending protocols, and automated trading to operate directly on-chain. As a result, they have become the <a href=\"https:\/\/cryptoslate.com\/ethereum-is-fighting-for-survival-as-insiders-warn-a-dangerous-complacency-could-make-it-irrelevant-by-2030\/\">two most dominant platforms for DeFi<\/a> activity in the industry, with over $100 billion in value locked.<\/p>\n<p>However, XRPL lacked that capability, so activity stayed limited to transfers.<\/p>\n\n<div class=\"cs-article-embed\">\n    <a href=\"https:\/\/cryptoslate.com\/ethereum-is-fighting-for-survival-as-insiders-warn-a-dangerous-complacency-could-make-it-irrelevant-by-2030\/\" class=\"cs-article-embed__link\">\n                    <div class=\"cs-article-embed__media\">\n                <img src=\"https:\/\/cryptoslate.com\/wp-content\/uploads\/2025\/12\/ethereum-irrelevant-1024x538.jpg\" alt=\"Ethereum is fighting for survival as insiders warn a &#8220;dangerous complacency&#8221; could make it irrelevant by 2030\" loading=\"lazy\" decoding=\"async\">\n            <\/div>\n                <div class=\"cs-article-embed__body\">\n            <span class=\"cs-article-embed__related-reading\">Related Reading<\/span>\n            <h3 class=\"cs-article-embed__title\">Ethereum is fighting for survival as insiders warn a &#8220;dangerous complacency&#8221; could make it irrelevant by 2030<\/h3>\n                            <p class=\"cs-article-embed__summary\">Ethereum seeks accelerated innovation to regain its edge as Solana&#039;s high-velocity activities challenge its dominance.<\/p>\n                                        <div class=\"cs-article-embed__meta\">\n                                            <span class=\"cs-article-embed__meta-item\">Dec 15, 2025<\/span>\n                                                                <span class=\"cs-article-embed__meta-divider\">&middot;<\/span>\n                                                                <span class=\"cs-article-embed__meta-item\">Oluwapelumi Adejumo<\/span>\n                                    <\/div>\n                    <\/div>\n    <\/a>\n<\/div>\n\n<p>The native smart contract on AlphaNet changes that dynamic. It introduces <a href=\"https:\/\/cryptoslate.com\/anthropic-ai-smart-contract-exploits\/\">smart contract<\/a> tools that let developers build directly on the base chain without sidechains or external frameworks.<\/p>\n<p>These contracts tap into XRPL's existing features, such as the automated market makers, decentralized exchange, and escrow systems, giving builders room to create DeFi services that go beyond simple payments.<\/p>\n<p>That opens XRPL to new frontiers and lowers the barrier for teams familiar with existing smart contract languages. At the same time, it gives the network a way to compete for on-chain volume without relying only on payment flows.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The XRP Ledger (XRPL) is ending the year with major technological developments after a year that saw it gain significant adoption and milestones. On Dec. 24, Denis Angell, a lead software engineer at XRPL Labs, announced the integration of &#8220;post-quantum&#8221; cryptography and native smart contracts into AlphaNet, the project\u2019s public developer network. The &#8216;Q-Day&#8217; inevitability [&hellip;]<\/p>\n","protected":false},"author":720,"featured_media":511940,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[37,76736],"tags":[77773,80870,72399,79231,78137],"post_folder":[],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.9 (Yoast SEO v21.9.1) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>XRPL flips to quantum-safe signatures; 2,420-byte proofs replace elliptic curves<\/title>\n<meta name=\"description\" content=\"XRPL&#039;s move to post-quantum cryptography aims to future-proof the ledger against revolutionary computing threats.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/cryptoslate.com\/xrpl-flips-to-quantum-safe-signatures-2420-byte-proofs-replace-elliptic-curves\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"XRPL flips to quantum-safe signatures; 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