{"id":15600,"date":"2015-08-13T19:56:00","date_gmt":"2015-08-13T19:56:00","guid":{"rendered":"https:\/\/www.rambus.com\/?p=15600"},"modified":"2019-02-06T14:07:06","modified_gmt":"2019-02-06T22:07:06","slug":"inventions-dpa-countermeasures","status":"publish","type":"post","link":"https:\/\/www.rambus.com\/inventions-dpa-countermeasures\/","title":{"rendered":"DPA Countermeasures"},"content":{"rendered":"<p>Many electronic devices that use cryptography are susceptible to side channel attacks. These low-cost, non-invasive methods enable attackers to extract the secret cryptographic keys used during normal device operations by monitoring a device\u2019s timing, power consumption, or electromagnetic emissions. Side channel attacks leave no trace, and can often be performed quickly using consumer-level equipment. Once the secret keys have been extracted, attackers can gain unauthorized access, decrypt or forge messages, steal identities, clone devices, create unauthorized signatures, and perform other unauthorized transactions. DPA Countermeasures are fundamental techniques developed to protect against side channel attacks\u2014safeguarding billions of devices from unauthorized use and access.<\/p>\n<ul>\n<li>Superior protection against side channel attacks<\/li>\n<li>Simplified device testing for power analysis vulnerabilities<\/li>\n<\/ul>\n<h2>What are DPA Countermeasures?<\/h2>\n<p><img decoding=\"async\" class=\"aligncenter\" src=\"https:\/\/www.rambus.com\/wp-content\/uploads\/2015\/08\/DPA-Countermeasures.png\" alt=\"Cryptographic key extraction using differential Power Analysis (DPA)\" \/><\/p>\n<p>Simple Power Analysis (SPA) and Differential Power Analysis (DPA) are powerful, non-invasive side channel attacks that allow adversaries to compromise the security of tamper-resistant devices by analyzing their power consumption. SPA recovers secret keys through direct observation of a device\u2019s power consumption, while DPA attacks employ statistical techniques to extract secret key information from multiple power consumption measurements. DPA can extract secret keys in a noisy environment where the power consumption of the cryptographic computation is a very small fraction of the overall power consumption of a system. DPA Countermeasures were developed to protect tamper-resistant devices against side channel attacks including SPA, DPA and related electromagnetic (EM) attacks.<\/p>\n<p>DPA Countermeasures consist of a broad range of software, hardware, and protocol techniques that protect tamper-resistant devices from side channel attacks in a number of ways including:<\/p>\n<ul>\n<li>Leak reduction \u2013 reducing information leaked into the side channel to decrease signal-to-noise (S\/N) ratios<\/li>\n<li>Amplitude and temporal noise \u2013 adding amplitude or temporal noise into the side channel to decrease S\/N ratio<\/li>\n<li>Balanced hardware and software \u2013 using hardware and software-based techniques to represent and process data in ways designed to minimize observable data-dependent variations within the side channel<\/li>\n<li>Incorporating randomness \u2013 representing cryptographic intermediates in forms that incorporate unpredictable information to reduce correlation between side channels and the original intermediates<\/li>\n<li>Protocol-level countermeasures \u2013 modifying cryptographic protocols using key update mechanisms to limit the amount of side channel information available to an attacker for any particular key<\/li>\n<\/ul>\n<h2>Who Benefits?<\/h2>\n<p>Device and system manufacturers, and end users benefit from the high-levels of security that are provided at the hardware level to protect against side channel attacks. Devices and industries that benefit from DPA Countermeasures include telecommunications, payments and banking, entertainment, pay television, government and defense, mobile devices, automotive, smart cards, media storage and integrated circuits.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Many electronic devices that use cryptography are susceptible to side channel attacks. These low-cost, non-invasive methods enable attackers to extract the secret cryptographic keys used during normal device operations by monitoring a device\u2019s timing, power consumption, or electromagnetic emissions. Side channel attacks leave no trace, and can often be performed quickly using consumer-level equipment. Once [&hellip;]<\/p>\n","protected":false},"author":6,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","footnotes":"","_links_to":"","_links_to_target":""},"categories":[662,664],"tags":[],"class_list":{"0":"post-15600","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-rambus-inventions","7":"category-i-security","8":"entry"},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.9 (Yoast SEO v26.9) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Invention: DPA Countermeasures - Rambus<\/title>\n<meta name=\"description\" content=\"DPA Countermeasures are fundamental techniques developed to protect against side channel attacks\u2014safeguarding billions of devices from unauthorized use and access.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.rambus.com\/inventions-dpa-countermeasures\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"DPA Countermeasures\" \/>\n<meta property=\"og:description\" content=\"Many electronic devices that use cryptography are susceptible to side channel attacks. These low-cost, non-invasive methods enable attackers to extract\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.rambus.com\/inventions-dpa-countermeasures\/\" \/>\n<meta property=\"og:site_name\" content=\"Rambus\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/RambusInc\" \/>\n<meta property=\"article:published_time\" content=\"2015-08-13T19:56:00+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2019-02-06T22:07:06+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.rambus.com\/wp-content\/uploads\/2015\/08\/DPA-Countermeasures.png\" \/>\n<meta name=\"author\" content=\"fongj@rambus.com\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@rambusinc\" \/>\n<meta name=\"twitter:site\" content=\"@rambusinc\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.rambus.com\/inventions-dpa-countermeasures\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.rambus.com\/inventions-dpa-countermeasures\/\"},\"author\":{\"name\":\"fongj@rambus.com\",\"@id\":\"https:\/\/www.rambus.com\/#\/schema\/person\/37e2e7e0a04304c805d567b056b6282e\"},\"headline\":\"DPA Countermeasures\",\"datePublished\":\"2015-08-13T19:56:00+00:00\",\"dateModified\":\"2019-02-06T22:07:06+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.rambus.com\/inventions-dpa-countermeasures\/\"},\"wordCount\":421,\"publisher\":{\"@id\":\"https:\/\/www.rambus.com\/#organization\"},\"image\":{\"@id\":\"https:\/\/www.rambus.com\/inventions-dpa-countermeasures\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.rambus.com\/wp-content\/uploads\/2015\/08\/DPA-Countermeasures.png\",\"articleSection\":[\"Inventions\",\"Security\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.rambus.com\/inventions-dpa-countermeasures\/\",\"url\":\"https:\/\/www.rambus.com\/inventions-dpa-countermeasures\/\",\"name\":\"Invention: DPA Countermeasures - 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