Based upon both market trends and device usage on campus, the ISO has opted to specify approved methods for encrypting Apple, Blackberry, and Android based handheld devices.
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Apple iOS devices
Supported devices include the iPhone 3GS, iPhone 4, iPad, and iPod Touch (3rd generation or later) only, running iOS 4.x. Earlier versions of the hardware and operating system software do not support key security features, such as hardware encryption.
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RIM BlackBerry OS devices
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Please see: https://security.utexas.edu/iso-policies/approved-encryption-methods