{"id":481,"date":"2014-09-23T14:26:34","date_gmt":"2014-09-23T14:26:34","guid":{"rendered":"http:\/\/skeemipesa.ee\/tehnohack\/?p=481"},"modified":"2014-09-23T14:31:01","modified_gmt":"2014-09-23T14:31:01","slug":"more-secure-nfc-based-physical-access-control","status":"publish","type":"post","link":"https:\/\/www.tehnohack.ee\/2014\/more-secure-nfc-based-physical-access-control\/","title":{"rendered":"NFC-based physical access-control"},"content":{"rendered":"<p>Usually the access-control systems trust that the card Unique ID is unique, but this is actually quite trivially spoofable. A proper solution adds an encrypted application on the card with a separate identifier (and possible some access-control information if we do not want to always check with a server which ACLs given card has). The aim is to build a simple-to-deploy secure (as long as the servers you get your ACL data from are) system.<\/p>\n<p>This can be built from COTS components, that adds size and cost: optimally we would design a board that has the NFC-reader chip (and U.FL connector for an antenna board, plus the PCB-antenna board), accepts something like the Raspberry Pi compute module (or similar) via SO-DIMM connector and has proper 802.3af (or at) PoE for powering it all. Outputs for relays and leds (needs also several adjustable switching regulators for various voltages: the electronic locks usually need 12V, the SOC\/MCU usually runs at 3.3V, many other things need 5V&#8230;)<\/p>\n<p><strong>Knowledge needed to team:<\/strong> Industrial designer, experienced PCB designer, C coders, security expert<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Usually the access-control systems trust that the card Unique ID is unique, but this is actually quite trivially spoofable. A proper solution adds an encrypted application on the card with a separate identifier<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[23],"tags":[],"_links":{"self":[{"href":"https:\/\/www.tehnohack.ee\/2014\/wp-json\/wp\/v2\/posts\/481"}],"collection":[{"href":"https:\/\/www.tehnohack.ee\/2014\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.tehnohack.ee\/2014\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.tehnohack.ee\/2014\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.tehnohack.ee\/2014\/wp-json\/wp\/v2\/comments?post=481"}],"version-history":[{"count":4,"href":"https:\/\/www.tehnohack.ee\/2014\/wp-json\/wp\/v2\/posts\/481\/revisions"}],"predecessor-version":[{"id":485,"href":"https:\/\/www.tehnohack.ee\/2014\/wp-json\/wp\/v2\/posts\/481\/revisions\/485"}],"wp:attachment":[{"href":"https:\/\/www.tehnohack.ee\/2014\/wp-json\/wp\/v2\/media?parent=481"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.tehnohack.ee\/2014\/wp-json\/wp\/v2\/categories?post=481"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.tehnohack.ee\/2014\/wp-json\/wp\/v2\/tags?post=481"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}