Security for Android is useless really, most of them in recent tests failed to detect any malware at all out of all the tests
Security for Android is reading the permissions the app asks for and where you got the App from in the first place
I have the ASUS Transformer running ICS 4.0.3 with no security software ever installed on it, I install .apk apps from anywhere I find them and have never had any problems with malware, I have my email accounts connected to it and they all still belong to me
Security for Android is a farse, and malware for Android is aimed at Phones so they can force premium rate calls and texts and the bad guys get money from that
For tablets without a simcard, there is no worry about malware on Android, or, as much worry as there is with Linux OS on a PC