German Security Researchers have discovered that freezing an Android phone allows hackers to access the Encrypted data stored in the phone.

The encryption method introduced in the Android version "Ice cream sandwich" by Google. 

The researchers bypassed this encryption system method by freezing the smartphone for an hour.

"Quickly connecting and disconnecting the battery of a frozen phone forced the handset into a vulnerable mode. " According to BBC report.

"This loophole let them start it up with some custom-built software rather than its onboard Android operating system."

The hack allowed the researchers to access the encrypted contact lists, browsing histories and photos.

For more information:
https://www1.informatik.uni-erlangen.de/frost