Android 4.1 Jelly Bean OS is the most secure version Google's mobile operating system so far, according to security researcher Jon Oberheide.

Oberheide, chief technology officer of DUO Security, said that Jelly Bean is the first version of Android OS that has properly implemented address space layout randomization (ASLR).

Android has always been an attractive target for kernel attackers. But, Jelly Bean has the data execution deterrence technologies. In addition its has ASLR that makes it difficult for hackers and malware traders to exploit memory corruption vulnerabilities in the OS as they can just guess at where their malicious software will load because of the fact that memory mapping for OS processes are randomized.

Oberheide noted that Ice Cream Sandwich was the first version of Android OS to implement ASLR technology, but it was not done perfectly and thus it failed to allay enough real-world attacks.

Commenting about the Jelly Bean OS, the security researcher said, "In Jelly Bean most binaries are now compiled/linked with the PIE flag, which means the executable mapping will be properly randomized when executed."

But, Oberheide also pointed to some weak spots in the 32-bit ASLR that Google is using in the newest version of its Android OS. He said Apple's integration of an even more secure form of the technology dubbed in-kernel ASLR in the iOS 6, would likely become the new security gold standard for mobile operating systems.