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Wednesday, 28 December 2011

Using a Custom Certificate Trust Store on Android

01:08 | Posted by

As mentioned in a previous post, Android 4.0 (ICS) adds both a system UI and SDK API's that let you add certificates to the system trust store. On all previous version though, the system trust store is read-only and there is no way to add certificates on non-rooted devices. Therefore, if you want to connect to a server that is using a certificate not...

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Wednesday, 21 December 2011

Using ECDH on Android

01:31 | Posted by

Elliptic curve cryptography (ECC) offers equivalent or higher levels of security than the currently widely deployed RSA and Diffie�Hellman (DH) algorithms using much shorter keys. For example, the computational effort  for cryptanalysis of a 160-bit ECC key is roughly equivalent to that of a 1024-bit key (NIST). The shift to ECC...

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Monday, 12 December 2011

Hanzi Recognizer v2.0 Released

03:53 | Posted by

The latest version is now available in the Android Market. There are no new user visible features, but the  renewed UI and full support for tablets warrant the major version bump.Hanzi Recognizer now has an app-wide action bar, available both on the newer Ice Cream Sandwich (4.0) and Honeycomb (3.x) Android versions, and on all mainstream Android...

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Thursday, 1 December 2011

ICS Trust Store Implementation

21:25 | Posted by

In the previous two posts we looked at the internal implementation of the Android credential storage, and how it is linked to the new KeyChain API introduced in ICS. As briefly mentioned in the second post, there is also a new TrustedCertificateStore class that manages user installed CA certificates. In this entry we will examine how the new trust...

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Wednesday, 30 November 2011

ICS Credential Storage Implementation, Part 2

19:11 | Posted by

In the previous entry, we found how Android's keystore daemon manages keys and certificates, and how to connect to it using the provided keystore_cli utility. Now we will look at the intermediate layers between the OS daemon and the public KeyChain API introduced in ICS.Browsing the android.security package, we find two AIDL files: IKeyChainService.aidl...

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Tuesday, 29 November 2011

ICS Credential Storage Implementation

22:34 | Posted by

In the previous entry, we looked at how the new ICS KeyChain API is used and tried installing a user private key/certificate pair and a CA certificate. Now we'll will try to find out where  they are actually stored and how they are protected.Looking at frameworks/base/keystore/java/android/security, we notice several interesting classes that are not mentioned in the SDK documentation. The...

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Using the ICS KeyChain API

00:01 | Posted by

Update: Sample app code is now available on github.The recently released Android 4.0 (Ice Cream Sandwich, ICS) introduces a new, unified UI for both tablets and handsets, lots of 'people-centric' communication and sharing features and other convenient improvements such as a better camera app and the much-hyped face unlock. Since everyone is talking...

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Monday, 28 November 2011

Kanji Recognizer v2.0

02:37 | Posted by

It's been a while since the last release, but the latest version is finally available. The focus of this release is an improved new UI and full support for tablets.The app is now using an action bar for easier access to key functionality. This is a feature originally only available on the Honeycomb (3.x) and Ice Cream Sandwich (4.0) Android...

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Sunday, 6 November 2011

WWWJDIC for Android 2.1 Released

06:38 | Posted by

The newest release is now live in the Android Market. The highlights of this version are improved Japanese text-to-speech (TTS) and Android 4.0 (Ice Cream Sandwich, ICS) support.Version 2.0 introduced Japanese TTS support using the free N2 TTS speech engine, but apparently (and unfortunately) it is not available from the Android Market outside...

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Friday, 30 September 2011

WWWJDIC for Android 2.0

04:34 | Posted by

More than a year and a half since the initial release to the Android Market, WWWJDIC for Android's second major version update is now live. It brings a refreshed UI for phones, a fully optimized and easier to use interface for tablets, and one of the most often requested features -- Japanese text-to-speech. Get it now from the Market and read...

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Thursday, 18 August 2011

WWWJDIC for Android 1.8.7 Released

04:34 | Posted by

The latest version is now available in the Android Market and soon in the Amazon Appstore.Example search has been largely improved by using a feature recently added to WWWJDIC's API. While clicking on the 'Ex.' button next to a dictionary entry would only show you sentences containing the exact word before, searching for examples is a lot...

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