Android 4.1 Jelly Bean impenetrable Hackers and Viruses

the level of security on Android 4.1. Jelly Bean is better than the previous version, namely the Android 4.0 Ice Cream Sandwich, Jelly Bean implement security because Adress Space Layout Randomization based (ASLR). Thanks ASLR, hackers and malware so difficult to exploit memory corruption flaws because the memory mapping for surgery underwent randomization system, so that cyber criminals can only guess where the malicious programs they will be loaded. in previous versions, the implementation of ASLR on Ice Cream Sandwich is not optimum and not really able to mitigate the threat in the real world.

In addition to ASLR technology, Jelly Bean also Combined with data execution prevention technologies are also embedded in Google's latest Android OS, Jelly Bean into the mobile operating system's security system with the most qualified.

Executable mapping in the process address space were not randomized in Ice Cream Sandwich, so it remains possible that ROP-style attacks using the entire executable. At Jelly Bean, most binaries have now been compiled or linked with PIE flag, which means that the executable mapping is hashed correctly when executed, this makes android 4.1 has a better defense mechanism against malicious code execution and information leakage.
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Android 4.1 Jelly Bean impenetrable Hackers and Viruses - All About Android