The [[Open Mobile Terminal <s>Platform]]</s> (OMTP) first defined TEE in their "Advanced Trusted Environment:OMTP TR1" standard, defining it as a "set of hardware and software components providing facilities necessary to support applications," which had to meet the requirements of one of two defined security levels. The first security level, Profile 1, was targeted against only software attacks, while Profile 2, was targeted against both software and hardware attacks.<ref>{{cite web |url=http://www.gsma.com/newsroom/wp-content/uploads/2012/03/omtpadvancedtrustedenvironmentomtptr1v11.pdf |title=Omtp Hardware Requirements And Defragmentation |website=Gsma.org |date= |access-date=2017-05-17 |archive-date=2018-12-14 |archive-url=https://web.archive.org/web/20181214114609/https://www.gsma.com/newsroom/wp-content/uploads/2012/03/omtpadvancedtrustedenvironmentomtptr1v11.pdf |url-status=live }}</ref>
Commercial TEE solutions based on ARM [[TrustZone]] technology, conforming to the TR1 standard, were later launched, such as Trusted Foundations developed by Trusted Logic.<ref>{{Cite web|url=http://www.trusted-logic.com/IMG/pdf/TRUSTED_LOGIC_TRUSTED_FOUNDATIONS_OMTP_FINAL.pdf|archive-url = https://web.archive.org/web/20140903041544/http://www.trusted-logic.com/IMG/pdf/TRUSTED_LOGIC_TRUSTED_FOUNDATIONS_OMTP_FINAL.pdf|archive-date = 2014-09-03|title = Gemalto's website has moved to Thales}}</ref>
