Washington, Feb 06 : A new technology reportedly allows stronger protection of Facebook's mobile app data that gets stored on a smartphone's SD card.

Facebook's Conceal, a set of Java APIs, has been aimed at safeguarding the vulnerable data present on the SD card, which is treated as a publicly accessible directory by Android's privacy model.

Facebook developer, Subodh Iyenger explained that as SD card are treated as a publicly accessible directory, it allows data to be read by any app, with the right permissions, PC World reports.

Iyenger said that Conceal works by 'wrapping' whatever data is written to a smartphone's SD card in a layer of cryptography, using subset of cryptographic algorithms and AES to generate a Message Authentication Code to validate the data package and validate that it hasn't been tampered with.

The report said that Facebook has made the Conceal technology open-source, so that any app developer could use it. (ANI)