{"id":2730,"date":"2020-06-05T13:48:00","date_gmt":"2020-06-05T13:48:00","guid":{"rendered":"http:\/\/10.24.225.70\/?p=2730"},"modified":"2026-04-26T23:25:58","modified_gmt":"2026-04-26T21:25:58","slug":"pseudonymization-and-anonymization-of-personal-data-what-is-the-difference","status":"publish","type":"post","link":"https:\/\/complior.se\/en\/pseudonymization-and-anonymization-of-personal-data-what-is-the-difference\/","title":{"rendered":"Pseudonymization and anonymization of personal data"},"content":{"rendered":"<div class=\"wp-block-uagb-container uagb-block-1c95cc62 alignfull uagb-is-root-container\"><div class=\"uagb-container-inner-blocks-wrap\">\n<div class=\"wp-block-group blockera-block blockera-block-627ud4 is-vertical is-layout-flex wp-container-core-group-is-layout-fe9cc265 wp-block-group-is-layout-flex\">\n<div class=\"wp-block-kadence-advancedbtn kb-buttons-wrap kb-btns2730_8b9243-9b\"><a class=\"kb-button kt-button button kb-btn2730_ec1278-b7 kt-btn-size-standard kt-btn-width-type-auto kb-btn-global-fill  kt-btn-has-text-true kt-btn-has-svg-true  wp-block-kadence-singlebtn\" href=\"https:\/\/complior.se\/en\/resources\/\"><span class=\"kb-svg-icon-wrap kb-svg-icon-fe_arrowLeft kt-btn-icon-side-left\"><svg viewbox=\"0 0 24 24\"  fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"  aria-hidden=\"true\"><line x1=\"19\" y1=\"12\" x2=\"5\" y2=\"12\"\/><polyline points=\"12 19 5 12 12 5\"\/><\/svg><\/span><span class=\"kt-btn-inner-text\">Tillbaka till resurser<\/span><\/a><\/div>\n\n\n\n<span class=\"kt-adv-heading2730_18573d-00 wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading2730_18573d-00\">Blog<\/span>\n\n\n\n<h1 class=\"kt-adv-heading2730_d09dd1-9a animated fadeIn wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading2730_d09dd1-9a\">Pseudonymization and anonymization of personal data<\/h1>\n\n\n\n<div class=\"wp-block-group animated fadeIn is-nowrap is-layout-flex wp-container-core-group-is-layout-6c531013 wp-block-group-is-layout-flex\"><div class=\"publish-date-container\">\r\n\t<svg\r\n\t\twidth=\"16\"\r\n\t\theight=\"16\"\r\n\t\tviewbox=\"0 0 24 24\"\r\n\t\tfill=\"none\"\r\n\t\tstroke=\"#4b4b4b\"\r\n\t\tstroke-width=\"2\"\r\n\t\tstroke-linecap=\"round\"\r\n\t\tstroke-linejoin=\"round\"\r\n\t\txmlns=\"http:\/\/www.w3.org\/2000\/svg\"\r\n\t\taria-hidden=\"true\"\r\n\t>\r\n\t\t<rect x=\"3\" y=\"4\" width=\"18\" height=\"18\" rx=\"2\" ry=\"2\"><\/rect>\r\n\t\t<line x1=\"16\" y1=\"2\" x2=\"16\" y2=\"6\"><\/line>\r\n\t\t<line x1=\"8\" y1=\"2\" x2=\"8\" y2=\"6\"><\/line>\r\n\t\t<line x1=\"3\" y1=\"10\" x2=\"21\" y2=\"10\"><\/line>\r\n\t<\/svg>\r\n\t<span class=\"date-text\">\r\n\t\tJun 05, 2020\t<\/span>\r\n<\/div>\n\n\n<div class=\"kt-adv-heading2730_1a8bb3-d8 wp-block-kadence-advancedheading kt-adv-heading-has-icon animated fadeIn delay-100ms\" data-kb-block=\"kb-adv-heading2730_1a8bb3-d8\"><span class=\"kb-svg-icon-wrap kb-adv-heading-icon kb-svg-icon-fe_clock kb-adv-heading-icon-side-left\"><svg viewbox=\"0 0 24 24\"  fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"  aria-hidden=\"true\"><circle cx=\"12\" cy=\"12\" r=\"10\"\/><polyline points=\"12 6 12 12 16 14\"\/><\/svg><\/span><span class=\"kb-adv-text-inner\">3 min <\/span><\/div><\/div>\n<\/div>\n\n\n\n<figure class=\"wp-block-kadence-image kb-image2730_dae379-b4 size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"473\" src=\"https:\/\/complior.se\/wp-content\/uploads\/2020\/06\/Pseud-03-1024x473.png\" alt=\"cartoon of an anonymous man\" class=\"kb-img wp-image-51155\" srcset=\"https:\/\/complior.se\/wp-content\/uploads\/2020\/06\/Pseud-03-1024x473.png 1024w, https:\/\/complior.se\/wp-content\/uploads\/2020\/06\/Pseud-03-300x139.png 300w, https:\/\/complior.se\/wp-content\/uploads\/2020\/06\/Pseud-03-768x355.png 768w, https:\/\/complior.se\/wp-content\/uploads\/2020\/06\/Pseud-03-18x8.png 18w, https:\/\/complior.se\/wp-content\/uploads\/2020\/06\/Pseud-03.png 1361w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-uagb-container uagb-block-2eeb7bfc alignfull uagb-is-root-container\"><div class=\"uagb-container-inner-blocks-wrap\">\n<div class=\"wp-block-group blockera-block blockera-block-f909nb is-vertical is-layout-flex wp-container-core-group-is-layout-b2c973f4 wp-block-group-is-layout-flex\">\n<h2 class=\"kt-adv-heading2730_29d9a0-b9 wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading2730_29d9a0-b9\">How GDPR Uses Privacy by Design to Minimize Personal Data<\/h2>\n\n\n\n<p class=\"kt-adv-heading2730_3f6e36-12 wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading2730_3f6e36-12\">One thing that is heavily emphasised in GDPR is the importance of Privacy by Design. Mechanisms to protect personal integrity should be built into IT systems and services.<br><br>One of the core principles is data minimization. This means that all products and services should be designed so that as little personal data as possible is processed. According to the Swedish Data Protection Authority you can do this in the following ways:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li class=\"blockera-block blockera-block-hgoob1 has-manrope-font-family\" style=\"font-size:clamp(14px, 0.875rem + ((1vw - 3.2px) * 0.227), 16px);font-style:normal;font-weight:500\">Limit data processing to information that only identifies an individual indirectly<\/li>\n\n\n\n<li class=\"blockera-block blockera-block-1bc2j8e has-manrope-font-family\" style=\"font-size:clamp(14px, 0.875rem + ((1vw - 3.2px) * 0.227), 16px);font-style:normal;font-weight:500\">Limit data gathering to data that is less sensitive<\/li>\n\n\n\n<li class=\"blockera-block blockera-block-ityxuw has-manrope-font-family\" style=\"font-size:clamp(14px, 0.875rem + ((1vw - 3.2px) * 0.227), 16px);font-style:normal;font-weight:500\">Replace names, e.g., with pseudonyms<\/li>\n\n\n\n<li class=\"blockera-block blockera-block-fby2d5 has-manrope-font-family\" style=\"font-size:clamp(14px, 0.875rem + ((1vw - 3.2px) * 0.227), 16px);font-style:normal;font-weight:500\">Do not routinely have personal identity numbers as fields in databases<\/li>\n<\/ul>\n\n\n\n<p class=\"kt-adv-heading2730_0587b3-36 wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading2730_0587b3-36\">Two terms that have been used a lot when discussing Privacy by Design and data minimization are anonymization and pseudonymization.<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-group blockera-block blockera-block-1akse8p is-vertical is-layout-flex wp-container-core-group-is-layout-b2c973f4 wp-block-group-is-layout-flex\">\n<h2 class=\"kt-adv-heading2730_0df811-2d wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading2730_0df811-2d\">So what does anonymization and pseudonymization mean? How are they different?<\/h2>\n\n\n\n<p class=\"kt-adv-heading2730_afe5c5-45 wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading2730_afe5c5-45\">Both anonymization and pseudonymization refer to hiding identities and personal data \u2013 but in different ways.<\/p>\n\n\n\n<div class=\"wp-block-group blockera-block blockera-block-1l97by0 is-vertical is-layout-flex wp-container-core-group-is-layout-90752e8f wp-block-group-is-layout-flex\">\n<h3 class=\"kt-adv-heading2730_0f4cd7-25 wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading2730_0f4cd7-25\">Pseudonymization<\/h3>\n\n\n\n<p class=\"kt-adv-heading2730_af227a-61 wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading2730_af227a-61\">Pseudonym means \u2018false name\u2019 in Greek, and a famous example is the fictional character Bruce Wayne, who sometimes goes by the name Batman. Similar to Bruce Wayne and Batman, pseudonymization in IT systems means that you mask the registered and their personal data.<br><br>In GDPR, pseudonymisation is defined as \u201dthe processing of personal data in such a way that the data can no longer be attributed to a specific data subject without the use of additional information.\u201d Personal data is thus exchanged with non-identifying data, and additional information is needed to recreate the original data. Further, the additional information should be kept separately.<br><br>Pseudonymization makes the information such as personal identification numbers and personal data less accessible to unauthorized users, and is a way to comply with GDPR requirements.<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-group blockera-block blockera-block-1l97by0 is-vertical is-layout-flex wp-container-core-group-is-layout-90752e8f wp-block-group-is-layout-flex\">\n<h3 class=\"kt-adv-heading2730_6c1b91-d4 wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading2730_6c1b91-d4\">Anonymization<\/h3>\n\n\n\n<p class=\"kt-adv-heading2730_45e840-64 wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading2730_45e840-64\">Anonymized data refers to data that is made anonymous in such a way that the registered can no longer be identified. You simply remove the possibilities of identifying a person, and no additional information can restore the original information. Anonymization is difficult. You completely lose the connection between data and the individual. Nevertheless, it can be a beneficial technique when the data is used for statistical or research purposes.<br><br>As you may gather, there is a clear distinction between the two concepts. Pseudonymization means that an individual can still be identified through indirect or additional information. This means that pseudonymized personal data is still in scope. Anonymization means that you cannot restore the original information, and such data is out of scope of the GDPR.<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-group blockera-block blockera-block-1l97by0 is-vertical is-layout-flex wp-container-core-group-is-layout-90752e8f wp-block-group-is-layout-flex\">\n<h3 class=\"kt-adv-heading2730_1d9cc3-51 wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading2730_1d9cc3-51\">How does pseudonymization and anonymization work in practice?<\/h3>\n\n\n\n<p class=\"kt-adv-heading2730_d4688c-03 wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading2730_d4688c-03\">There are different techniques you can use to pseudonymize, but also anonymise personal data.<br><br><br><strong>Directory Replacement<\/strong><br>Directory replacement means that you modify data about the registered, while there is still a link between the values. For example, you can use a customer number to identify an individual, and store information that directly identifies an individual, such as personal identification number, separately. In this way you pseudonymize the sensitive data. To anonymise, you should delete the separate sensitive information that directly identifies the registered.<br><br><strong>Scrambling<\/strong><br>In simple words, scrambling is when you mix letters, and some examples of scrambling techniques are encryption and hashing.<br><br><strong>Masking<\/strong><br>Masking means that some of the information is hidden using random characters or other data. Masking techniques are widely used in the payment industry and card data processing, where parts of the card number are masked, not the least to comply with PCI DSS.<br><\/p>\n<\/div>\n<\/div>\n<\/div><\/div>","protected":false},"excerpt":{"rendered":"<p>\t\t\t\t\t\tOne thing that is heavily emphasised in GDPR is the importance of Privacy by Design, but what anonymization and pseudonymization mean? <\/p>","protected":false},"author":2,"featured_media":51155,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"blogg","format":"standard","meta":{"_editorskit_title_hidden":false,"_editorskit_reading_time":0,"_editorskit_is_block_options_detached":false,"_editorskit_block_options_position":"{}","_eb_attr":"","inline_featured_image":false,"_uag_custom_page_level_css":"","wpm_timeformat":"","_wpm_styles":"","footnotes":""},"categories":[118],"tags":[117,120],"class_list":["post-2730","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blogg","tag-blog","tag-gdpr"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Pseudonymization and anonymization of personal data<\/title>\n<meta name=\"description\" content=\"One thing that is heavily emphasised in GDPR is the importance of Privacy by Design, but what anonymization and 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