manufacturer has provided NSA with sufficient evidence that the implementations of the two components are independent of one another."<ref>{{cite web |url=https://www.nsa.gov/Portals/70/documents/resources/everyone/csfc/capability-packages/MACPv2_1.pdf/ |title=Mobile Access Capability Package |publisher=US National Security Agency |access-date=28 February 2020 |quote=}}</ref>
The principle is practiced in the NSA's secure mobile phone called Fishbowl.<ref name=":0">{{cite book | last=Adams, | first=David /| last2=Maier, | first2=Ann-Kathrin | title=Big Seven Study (2016): BIG SEVEN Study,7 open source cryptoCrypto-messengersMessengers to be compared –(English/Deutsch) or:| Comprehensivepublisher=BoD Confidentiality– ReviewBooks &on AuditDemand of| GoldBug,publication-place=Norderstedt Encrypting| Edate=2019-Mail10-Client23 &| Secureisbn=978-3-7504-0897-5 Instant Messenger, Descriptions, tests and analysis reviews of 20 functions of the application GoldBug based on the essential fields and methods of evaluation of the 8 major international audit manuals for IT security investigations including 38 figures and 87 tables, URL:| url=https://sfphoenixnap.dl.sourceforge.net/projectsproject/goldbug/files/bigseven-crypto-audit.pdf – English / German Language, Version 1.1, 305 pages, June 2016 (ISBN: 110368003X – DNB: 2016B14779)}}</ref> The phones use two layers of encryption protocols, [[IPsec]] and [[Secure Real-time Transport Protocol]] (SRTP), to protect voice communications. The Samsung [[Galaxy S9]] Tactical Edition is also an approved CSfC Component.
