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Wednesday, 24 December 2014

Dissecting Lollipop's Smart Lock

08:28 | Posted by

Android 5.0 (Lollipop) has been out for a while now, and most of its new features have been introduced, benchmarked, or complained about extensively. The new release also includes a number of of security enhancements, of which disk encryption has gotten probably the most media attention. Smart Lock (originally announced at Google I/O 2014), which allows...

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Thursday, 23 October 2014

Android Security Internals is out

11:08 | Posted by

Some six months after the first early access chapters were announced, my book has now officially been released. While the final ebook PDF has been available for a few weeks, you can now get all ebook formats (PDF, Mobi and ePub) directly from the publisher, No Starch Press. Print books are also ready and should start shipping tomorrow (Oct 24th)....

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Sunday, 5 October 2014

Revisiting Android disk encryption

23:11 | Posted by

In iOS 8, Apple has expanded the scope of data encryption and now mixes in the user's passcode with an unextractable hardware UID when deriving an encryption key, making it harder to extract data from iOS 8 devices. This has been somewhat of a hot topic lately, with opinions ranging from praise for Apple's new focus on serious security, to demands...

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Wednesday, 23 July 2014

Secure voice communication on Android

00:27 | Posted by

While the topic of secure voice communication on mobile is hardly new, it has been getting a lot of media attention following the the official release of the Blackphone, Consequently, this is a good time to go back to basics and look into how secure voice communication is typically implemented. While this post focuses on Android, most of the discussion...

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Thursday, 8 May 2014

Using KitKat verified boot

07:00 | Posted by

Android 4.4 introduced a number of security enhancements, most notably SELinux in enforcing mode. One security feature that initially got some press attention, because it was presumably aiming to 'end all custom firmware', but hasn't been described in much detail, is verified boot. This post will briefly explain how verified boot works and then show...

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