This weekend PC Magazine considered the danger of jailbreaking. There are many people who do it, and because of the current popularity of Cydia Store there’s no question more average people want to try the risk. Especially when there are new providers who promise adult stuff. Charlie Miller, principal analyst at company Independent Security Evaluators, already did a jailbreak himself, but he warns about the risks involved. Once you jailbreak your iPhone, your no longer under the protection of security measures built-in by Apple. Normally applications run in a sandbox, but Cydia has root rights on the iPhone and the applications you install with it also have those rights. They can do whatever they want and users can easily install malware on their iPhone, if you want to. Experienced users can quickly see when something is not right, but this is not for everyone. There are repos who are being checked for malware, like the ones of Big Boss and iSpazio, but people don’t seem to have trouble adding loan repos if they promise a cool new application. Conclusion of PC Magazine: jailbreaking is dangerous.

“Lots of people do dangerous things and get away with it, either out of luck or skill, and jailbreaking is clearly dangerous. As a general matter it’s a really bad idea for users to do it unless they accept that they may seriously mess up their iPhones as a result.”

[ Source ]