Encryption of offline mail, calendar, contacts data on Android I'm very new to Android and I wonder what I can do in terms of encryption.

As I read it seems that only Android >= 2.3.3 supports encryption but my new device will be running Android 2.3.1. So I think there's no native solution to encrypt offline mail, calendar and contact data.

What solutions are there to protect my offline data?

Is it possible to encrypt the folders belonging to mail, calendar, contact? Decrypting should always happen when the screen is not lcoked.

Any ideas?
Encryption of saved data (the data on flash storage) is a feature of Android 4.0 and higher. The only non-4.0-device I am aware of that allows full flash storage encryption is the Lenovo Thinkpad Tablet.

Encryption of connection data (data that goes over the wire) was a big security concern in some Android versions. Google has released some updated versions of the affected Apps, but it's unkown if they where dispatched on every device. IIRC most fixes got into 2.3.5, but I can't find the source ATM - Googles disclosure policy is not so good. Here are some good resources about this topic:


The Insecurity of Google's ClientLogin Protocol
What Android sync'd data is encrypted?
Ungesicherte Einsichten (german) ("Unsecure Insights")