[轉]Android 6.0 re-implements mandatory storage encryption for new devices

http://arstechnica.com/gadgets/2015/10/android-6-0-re-implements-mandatory-device-encryption-for-new-devices/
Shortly after the announcement of iOS 8 in 2014, Google made headlines by saying that it would make full-device encryption mandatory... several months later... the company backed down, "strongly recommending" that Android device makers enable encryption...

Now Google has published... definition document for Android 6.0... For device implementations supporting full-disk encryption and with AES crypto performance above 50MiB/sec, the full-disk encryption MUST be enabled by default... device launched on an earlier Android version with full-disk encryption disabled... cannot meet the requirement... through a system software update... MAY be exempted.