{"id":28854,"date":"2025-12-04T10:00:03","date_gmt":"2025-12-04T10:00:03","guid":{"rendered":"https:\/\/99bitcoins.com\/fr\/?p=28854"},"modified":"2025-12-04T09:39:38","modified_gmt":"2025-12-04T09:39:38","slug":"zk-secret-santa-ethereum-cadeaux-sans-reveler-adresses","status":"publish","type":"post","link":"https:\/\/99bitcoins.com\/fr\/actu\/zk-secret-santa-ethereum-cadeaux-sans-reveler-adresses\/","title":{"rendered":"ZK Secret Santa : comment Ethereum veut offrir des cadeaux sans r\u00e9v\u00e9ler vos adresses"},"content":{"rendered":"<p>Envoyer un NFT \u00e0 un ami ou un peu d\u2019ETH \u00e0 un proche\u2026 Sur Ethereum, tout \u00e7a laisse une trace publique, et la surprise peut fondre vite. Avec <strong>ZK Secret Santa<\/strong>, l\u2019id\u00e9e est de jouer au Secret Santa \u201con-chain\u201d tout en gardant les adresses hors champ.<\/p>\n<h2>Quand la transparence d\u2019Ethereum g\u00e2che la surprise<\/h2>\n<p>Sur une blockchain, chaque transaction ressemble \u00e0 un re\u00e7u visible par tout le monde. Une adresse se recoupe parfois plus vite qu\u2019on ne le pense, via un ENS, des habitudes de portefeuille, ou un retrait. Dans un Secret Santa, <strong>le cadeau devient un indice<\/strong>, et l\u2019effet de surprise dispara\u00eet.<\/p>\n<p>Et plus le groupe est petit, plus c\u2019est simple \u00e0 deviner. Un montant rond, un NFT unique, et l\u2019histoire se reconstitue. Ce n\u2019est pas pour rien que la vie priv\u00e9e revient dans <a href=\"https:\/\/99bitcoins.com\/fr\/actu\/confidentialite-finance-onchain\/\">les discussions sur la confidentialit\u00e9 onchain<\/a>. Ici, l\u2019objectif est concret, <strong>offrir sans s\u2019afficher<\/strong>.<\/p>\n<h2>ZK Secret Santa, une loterie v\u00e9rifiable sans d\u00e9voiler les adresses<\/h2>\n<p>ZK Secret Santa (ZKSS) transforme le jeu en protocole, inscription, m\u00e9lange collectif, puis validation. Le contrat n\u2019apprend pas \u201cqui donne \u00e0 qui\u201d, mais il peut v\u00e9rifier que l\u2019assignation respecte les r\u00e8gles gr\u00e2ce \u00e0 un <strong>tirage au sort v\u00e9rifiable<\/strong>. La sp\u00e9cification est d\u00e9crite sur <a class=\"general-link\" href=\"https:\/\/ethresear.ch\/t\/zk-secret-santa-protocol\/23582\" target=\"_blank\" rel=\"noopener nofollow\">Ethereum Research<\/a>.<\/p>\n<p>Le d\u00e9fi, c\u2019est la triche. Il faut emp\u00eacher quelqu\u2019un de participer deux fois, ou de s\u2019assigner lui-m\u00eame. Le protocole utilise des <strong>nullifiers<\/strong>, des empreintes uniques qui prouvent \u201cje n\u2019ai pas d\u00e9j\u00e0 jou\u00e9\u201d sans r\u00e9v\u00e9ler l\u2019adresse. Il vise aussi une permutation \u201cd\u00e9rang\u00e9e\u201d, o\u00f9 <strong>aucun nom ne reste \u00e0 sa place<\/strong>, v\u00e9rifi\u00e9e via preuve.<\/p>\n<p>Pour \u00e9viter qu\u2019une inscription n\u2019expose votre adresse, l\u2019approche mentionne des relayers, qui envoient certaines transactions \u00e0 votre place. L\u2019observateur voit une validation cryptographique, pas votre identit\u00e9, c\u2019est <strong>la preuve qui parle<\/strong>.<\/p>\n<blockquote class=\"twitter-tweet\" data-width=\"500\" data-dnt=\"true\">\n<p lang=\"en\" dir=\"ltr\">Is it possible to play Secret Santa on-chain? Well, yes! <\/p>\n<p>Here is a formal specification of the ZK Secret Santa protocol that can be implemented in Solidity. It preserves the full privacy of gift senders while maintaining the game&#39;s trustlessness and correctness.<\/p>\n<p>Happy winter! <a href=\"https:\/\/t.co\/T3NC6eoty2\" rel=\"nofollow\" target=\"_blank\">pic.twitter.com\/T3NC6eoty2<\/a><\/p>\n<p>&mdash; Artem Chystiakov (@Arvolear) <a href=\"https:\/\/twitter.com\/Arvolear\/status\/1995511583645274536?ref_src=twsrc%5Etfw\" rel=\"nofollow\" target=\"_blank\">December 1, 2025<\/a><\/p><\/blockquote>\n<p><script async src=\"https:\/\/platform.twitter.com\/widgets.js\" charset=\"utf-8\"><\/script><\/p>\n<h2>Pourquoi ce \u201cjeu\u201d int\u00e9resse Ethereum bien au-del\u00e0 de No\u00ebl<\/h2>\n<p>Si vous remplacez \u201ccadeau\u201d par \u201cr\u00e9compense\u201d ou \u201callocation\u201d, l\u2019int\u00e9r\u00eat saute aux yeux. Vous voulez prouver qu\u2019une distribution est juste, sans exposer la liste des personnes ni les liens entre exp\u00e9diteurs et destinataires. C\u2019est de la <strong>coordination priv\u00e9e<\/strong>, et \u00e7a touche autant les DAOs que les programmes de primes.<\/p>\n<p>Ce type de proposition colle aussi \u00e0 un mouvement plus large. Ethereum pousse des briques centr\u00e9es sur la confidentialit\u00e9, et le Privacy Cluster montre que le sujet devient structurant. L\u2019id\u00e9e n\u2019est pas de \u201ctout cacher\u201d, mais de <strong>choisir ce qu\u2019on r\u00e9v\u00e8le<\/strong>.<\/p>\n<p><img decoding=\"async\" class=\"alignnone wp-image-28856 size-full\" src=\"https:\/\/99bitcoins.com\/fr\/wp-content\/uploads\/sites\/4\/2025\/12\/20251204_1038_DAO-Futuriste-Ethereum_simple_compose_01kbmbgvsyf0dafgvrds2z49f5.jpg\" alt=\"\" width=\"1536\" height=\"1024\" srcset=\"https:\/\/99bitcoins.com\/fr\/wp-content\/uploads\/sites\/4\/2025\/12\/20251204_1038_DAO-Futuriste-Ethereum_simple_compose_01kbmbgvsyf0dafgvrds2z49f5.jpg 1536w, https:\/\/99bitcoins.com\/fr\/wp-content\/uploads\/sites\/4\/2025\/12\/20251204_1038_DAO-Futuriste-Ethereum_simple_compose_01kbmbgvsyf0dafgvrds2z49f5-300x200.jpg 300w, https:\/\/99bitcoins.com\/fr\/wp-content\/uploads\/sites\/4\/2025\/12\/20251204_1038_DAO-Futuriste-Ethereum_simple_compose_01kbmbgvsyf0dafgvrds2z49f5-1024x683.jpg 1024w, https:\/\/99bitcoins.com\/fr\/wp-content\/uploads\/sites\/4\/2025\/12\/20251204_1038_DAO-Futuriste-Ethereum_simple_compose_01kbmbgvsyf0dafgvrds2z49f5-768x512.jpg 768w\" sizes=\"(max-width: 1536px) 100vw, 1536px\" \/><\/p>\n<h2>Un futur r\u00e9flexe ?<\/h2>\n<p>Sur le papier, ZKSS est \u00e9l\u00e9gant. Dans la vraie vie, g\u00e9n\u00e9rer des preuves zk peut co\u00fbter cher en calcul et compliquer l\u2019exp\u00e9rience. Pour que \u00e7a se diffuse, il faudra des interfaces simples et des co\u00fbts raisonnables, sinon <strong>\u00e7a restera un prototype<\/strong>.<\/p>\n<p>Derni\u00e8re nuance, la confidentialit\u00e9 d\u00e9pend du nombre de participants. Plus le groupe est grand, plus il est difficile de relier un cadeau \u00e0 une personne. C\u2019est pour \u00e7a que ce genre de protocole sert de laboratoire, il force \u00e0 penser UX, co\u00fbts et garanties en m\u00eame temps. Et le message est clair, Ethereum explore comment \u00eatre <strong>discret quand il le faut<\/strong>.<\/p>\n<hr>\n<p><strong>Sur le m\u00eame sujet<\/strong> :<\/p>\n<ul>\n<li><a class=\"general-link\" href=\"https:\/\/99bitcoins.com\/fr\/actu\/gensler-bitcoin-altcoins\/\" rel=\"\">Gensler attaque les altcoins : la d\u00e9claration qui fait trembler la crypto<\/a><\/li>\n<li><a class=\"general-link\" href=\"https:\/\/99bitcoins.com\/fr\/actu\/eth-avant-noel-pourquoi-ethereum-surprendre-2025\/\" rel=\"\">Acheter cette crypto avant No\u00ebl pourrait \u00eatre la meilleure chose \u00e0 faire en 2025<\/a><\/li>\n<li>Anonymat interdit d\u00e8s 2027, l\u2019Europe d\u00e9fie la confidentialit\u00e9 crypto<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Envoyer un NFT \u00e0 un ami ou un peu d\u2019ETH \u00e0 un proche\u2026 Sur Ethereum, tout \u00e7a laisse une trace publique, et la surprise peut fondre vite. Avec ZK Secret Santa, l\u2019id\u00e9e est de jouer au Secret Santa \u201con-chain\u201d tout en gardant les adresses hors champ. Quand la transparence d\u2019Ethereum g\u00e2che la surprise Sur une..<\/p>\n","protected":false},"author":136161,"featured_media":28855,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[10,6],"tags":[11],"coin":[15],"class_list":["post-28854","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-altcoins","category-actu","tag-altcoin"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>ZK Secret Santa : comment Ethereum veut offrir des cadeaux sans r\u00e9v\u00e9ler vos adresses<\/title>\n<meta name=\"description\" content=\"ZK Secret Santa propose un Secret Santa sur Ethereum via preuves zk, pour envoyer des cadeaux sans r\u00e9v\u00e9ler les adresses ni les paires donneur.\" \/>\n<meta name=\"robots\" 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