{"id":13484,"date":"2023-01-27T11:44:15","date_gmt":"2023-01-27T11:44:15","guid":{"rendered":"https:\/\/www.bitnovo.com\/blog\/?p=13484"},"modified":"2022-07-01T19:44:30","modified_gmt":"2022-07-01T19:44:30","slug":"who-is-david-chaum","status":"publish","type":"post","link":"https:\/\/www.bitnovo.com\/blog\/en\/who-is-david-chaum","title":{"rendered":"Who is David Chaum?"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_82_2 counter-hierarchy ez-toc-counter ez-toc-transparent ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Alternar tabla de contenidos\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #ffffff;color:#ffffff\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #ffffff;color:#ffffff\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 eztoc-toggle-hide-by-default' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.bitnovo.com\/blog\/en\/who-is-david-chaum\/#history_of_david_chaum\" >History of David Chaum<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.bitnovo.com\/blog\/en\/who-is-david-chaum\/#contributions_by_david_chaum\" >Contributions by David Chaum<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.bitnovo.com\/blog\/en\/who-is-david-chaum\/#digital_money\" >Digital Money<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.bitnovo.com\/blog\/en\/who-is-david-chaum\/#reliable_voting_system\" >Reliable Voting System<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.bitnovo.com\/blog\/en\/who-is-david-chaum\/#blind_signatures\" >Blind Signatures<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<span class=\"span-reading-time rt-reading-time\" style=\"display: block;\"><span class=\"rt-label rt-prefix\">Tiempo de lectura:<\/span> <span class=\"rt-time\"> 3<\/span> <span class=\"rt-label rt-postfix\">minutos<\/span><\/span><p>One of the greatest and most important\u00a0<strong>cryptographers<\/strong>\u00a0in the world is\u00a0<strong>David Lee Chaum<\/strong>. This pioneer of cryptography in the digital world stood out as one of the first developers of tools for\u00a0<strong>privacy protection<\/strong>. In this article we will talk about\u00a0<strong>David Chaum\u2019s<\/strong>\u00a0life and his main\u00a0<strong>achievements.<\/strong><\/p>\n<h2><span class=\"ez-toc-section\" id=\"history_of_david_chaum\"><\/span><strong>History of David Chaum<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>David\u2019s life began in\u00a0<strong>1955<\/strong>\u00a0in the United States. He studied at the University of Berkley in California. He received his doctorate in\u00a0<strong>1982<\/strong>\u00a0in\u00a0<strong>Computer Science<\/strong>\u00a0and Business Administration. Chaum was the creator of several\u00a0<strong>cryptographic<\/strong>\u00a0<strong>protocols<\/strong>\u00a0and the first idea of digital money\u00a0<strong>E-Cash.<\/strong><\/p>\n<p>Chaum has a long history of work as a\u00a0<strong>teacher<\/strong>, researcher and in the field of\u00a0<strong>cryptography<\/strong>\u00a0as a developer of\u00a0<strong>cryptographic protocols<\/strong>. In the same year of his graduation he became the founder of the National Association for Cryptographic Research (<strong>CAII<\/strong>). This foundation is currently active and is responsible for the organization of academic conferences for\u00a0<strong>cryptographic research<\/strong>.<\/p>\n<p>He held a\u00a0<strong>teaching<\/strong>\u00a0position in Business Administration at the graduate school of New York University and at the University of California. Chaum was part of a\u00a0<strong>Cryptography research<\/strong>\u00a0group in Amsterdam at the National Research Institute for Mathematics and Computer Science.<\/p>\n<p>In\u00a0<strong>1990<\/strong>\u00a0Chaum went a step further with the creation of\u00a0<strong>DigiCash Inc<\/strong>, an\u00a0<strong>electronic money<\/strong>\u00a0company. In this company he developed E-Cash, which was an improved version of his cryptographic system for digital payments. On this journey Chaum worked with other well-known cryptographers such as\u00a0<strong><a href=\"https:\/\/www.bitnovo.com\/blog\/en\/who-is-nick-szabo\/\">Nick Szabo<\/a>\u00a0and Eric Hughes.<\/strong><\/p>\n<p>In\u00a0<strong>1994<\/strong>\u00a0the first\u00a0<strong>World Wide Web<\/strong>\u00a0conference (WWW94) was held in Geneva, Switzerland. At this conference Chaum demonstrated how its digital payment system, E-Cash, enabled\u00a0<strong>electronic money payments<\/strong>\u00a0through computers with the use of software.<\/p>\n<p>In 1995 David received the\u00a0<strong>European Information Technology Award.<\/strong>\u00a0Subsequently in 2004 he became a\u00a0<strong>CAII<\/strong>\u00a0<strong>Fellow<\/strong>\u00a0and in 2010 he received the RSA Conference award for excellence in the field of mathematics.<\/p>\n<p>Chaum is more than a famous\u00a0<strong>cryptographer,<\/strong>\u00a0he is also a reference for the\u00a0<a href=\"https:\/\/www.bitnovo.com\/blog\/en\/what-is-a-cypherpunk\/\">Cypherpunk<\/a>\u00a0culture and the people who promoted the movement.<\/p>\n<div id=\"image_360406674\" class=\"img has-hover x md-x lg-x y md-y lg-y\">\n<div class=\"img-inner dark\"><img fetchpriority=\"high\" decoding=\"async\" class=\"attachment-large size-large lazyloaded\" src=\"https:\/\/www.bitnovo.com\/blog\/wp-content\/uploads\/2021\/04\/Qui%C3%A9n-es-David-Chaum1.jpg\" sizes=\"(max-width: 768px) 100vw, 768px\" srcset=\"https:\/\/www.bitnovo.com\/blog\/wp-content\/uploads\/2021\/04\/Qui\u00e9n-es-David-Chaum1.jpg 768w, https:\/\/www.bitnovo.com\/blog\/wp-content\/uploads\/2021\/04\/Qui\u00e9n-es-David-Chaum1-300x205.jpg 300w\" alt=\"Qui\u00e9n-es-David-Chaum\" width=\"768\" height=\"526\" data-srcset=\"https:\/\/www.bitnovo.com\/blog\/wp-content\/uploads\/2021\/04\/Qui\u00e9n-es-David-Chaum1.jpg 768w, https:\/\/www.bitnovo.com\/blog\/wp-content\/uploads\/2021\/04\/Qui\u00e9n-es-David-Chaum1-300x205.jpg 300w\" data-src=\"https:\/\/www.bitnovo.com\/blog\/wp-content\/uploads\/2021\/04\/Qui\u00e9n-es-David-Chaum1.jpg\" data-sizes=\"(max-width: 768px) 100vw, 768px\" \/><\/div>\n<\/div>\n<h2><span class=\"ez-toc-section\" id=\"contributions_by_david_chaum\"><\/span><strong>Contributions by David Chaum<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>David Chaum made countless\u00a0<strong>research and project<\/strong>\u00a0contributions. Projects that, for the most part, are aimed at\u00a0<strong>privacy<\/strong>. Below we will see some of these contributions.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"digital_money\"><\/span><strong>Digital Money<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>David is popularly and officially known as the\u00a0<strong>creator<\/strong>\u00a0of digital money. He introduced this concept in an article launched in\u00a0<strong>1982<\/strong>\u00a0with\u00a0<strong>blind signatures<\/strong>. In addition to marking the starting point of\u00a0<strong>cryptocurrencies<\/strong>, this initiative was one of the roots for the\u00a0<strong>Cypherpunk<\/strong>\u00a0movement.<\/p>\n<p>Chaum brought to the world the idea of getting\u00a0<strong>digital money<\/strong>\u00a0from a bank and spending it without it being possible to find the\u00a0<strong>origins<\/strong>\u00a0of the money or its\u00a0<strong>provenance<\/strong>. In 1988, the idea of allowing offline transactions that enabled\u00a0<strong>double spending<\/strong>\u00a0became more widely known.<\/p>\n<p>By\u00a0<strong>1990<\/strong>\u00a0the founding of\u00a0<strong>DigitalCash<\/strong>\u00a0was already a fact. Chaum had set up a cash company in Amsterdam with the aim of commercializing the ideas in his research.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"reliable_voting_system\"><\/span><strong>Reliable Voting System<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Among Chaum\u2019s contributions, a large part are directed to\u00a0<strong>voting systems<\/strong>. Among these contributions we find the idea of an end-to-end\u00a0<strong>verifiable<\/strong>\u00a0system. This idea was created in\u00a0<strong>1981<\/strong>.<\/p>\n<p>This was a system in which the\u00a0<strong>individual votes<\/strong>\u00a0of each voter were kept\u00a0<strong>private<\/strong>. In this way anyone could check that they had been counted correctly without putting the identity of any voter at risk.<\/p>\n<p>The main idea of this system was to allow voters to securely calculate vote totals with their personal computers. By\u00a0<strong>1991<\/strong>\u00a0David released\u00a0<strong>Sure Vote<\/strong>. This system allowed voters to use unreliable voting systems by submitting the vote to a process called \u201c<strong>voting code<\/strong>\u201d used in remote voting.<\/p>\n<p>By\u00a0<strong>1994<\/strong>\u00a0he introduced what would become the first in-person voting system where votes are\u00a0<strong>cryptographically<\/strong>\u00a0verified. These were just a few of the systems David created. Some of his later voting systems were\u00a0<strong>pret a voter, punchscan, and scantegrity.<\/strong><\/p>\n<h3><span class=\"ez-toc-section\" id=\"blind_signatures\"><\/span><strong>Blind Signatures<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>By\u00a0<strong>1982<\/strong>\u00a0the\u00a0<a href=\"https:\/\/www.bitnovo.com\/blog\/en\/what-are-the-blind-signatures\/\">blind signature<\/a>\u00a0was introduced for non-traceable payments. In the same article where Chaum introduced the idea of\u00a0<strong>digital cash<\/strong>, he introduced\u00a0<strong>blind signatures<\/strong>. This digital signature is based on ensuring the content of a message before\u00a0<strong>signing<\/strong>\u00a0<strong>it<\/strong>. All this with the objective that the\u00a0<strong>signer<\/strong>\u00a0cannot read the content.<\/p>\n<p>The blind signature of a message can be\u00a0<strong>verified publicly<\/strong>\u00a0against the original message, the only problem is that we would leave the message without the signature\u00a0<strong>protection<\/strong>\u00a0as if it carried a regular digital signature.<\/p>\n<p>Later in\u00a0<strong>1989<\/strong>,<strong>\u00a0irrefutable signatures<\/strong>\u00a0were introduced. These signatures were used in an\u00a0<strong>interactive verification<\/strong>\u00a0process. This consisted in the fact that the signing user could limit which users could verify this signature.<\/p>\n<p>Finally, in\u00a0<strong>1991, Chaum<\/strong>\u00a0introduced, with Eugene,\u00a0<strong>group signatures<\/strong>. These signatures allow a member of a group to sign a message\u00a0<strong>anonymously<\/strong>\u00a0and on behalf of the entire group. It should be noted that the administrator designated by the group has the ability to\u00a0<strong>revert<\/strong>\u00a0the\u00a0<strong>anonymity<\/strong>\u00a0of any signature belonging to a group member.<\/p>\n","protected":false},"excerpt":{"rendered":"<p><span class=\"span-reading-time rt-reading-time\" style=\"display: block;\"><span class=\"rt-label rt-prefix\">Tiempo de lectura:<\/span> <span class=\"rt-time\"> 3<\/span> <span class=\"rt-label rt-postfix\">minutos<\/span><\/span>One of the greatest and most important\u00a0cryptographers\u00a0in the world is\u00a0David Lee Chaum. This pioneer of cryptography in the digital world stood out as one of the first developers of tools for\u00a0privacy protection. In this article we will talk about\u00a0David Chaum\u2019s\u00a0life and his main\u00a0achievements. History of David Chaum David\u2019s life began in\u00a01955\u00a0in the United States. He [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":13485,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[165],"tags":[],"class_list":["post-13484","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cryptocurrencies"],"_links":{"self":[{"href":"https:\/\/www.bitnovo.com\/blog\/wp-json\/wp\/v2\/posts\/13484","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.bitnovo.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.bitnovo.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.bitnovo.com\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.bitnovo.com\/blog\/wp-json\/wp\/v2\/comments?post=13484"}],"version-history":[{"count":0,"href":"https:\/\/www.bitnovo.com\/blog\/wp-json\/wp\/v2\/posts\/13484\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bitnovo.com\/blog\/wp-json\/wp\/v2\/media\/13485"}],"wp:attachment":[{"href":"https:\/\/www.bitnovo.com\/blog\/wp-json\/wp\/v2\/media?parent=13484"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bitnovo.com\/blog\/wp-json\/wp\/v2\/categories?post=13484"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bitnovo.com\/blog\/wp-json\/wp\/v2\/tags?post=13484"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}