Apple has said that its mobile devices running on iOS software may be vulnerable to hacks, through which emails and communications could be intercepted. According to Johns Hopkins University cryptography professor Matthew Green, the vulnerability is "as bad as you could imagine."
As Reuters reported:
If attackers have access to a mobile user's network, such as by sharing the same unsecured wireless service offered by a restaurant, they could see or alter exchanges between the user and protected sites such as Gmail and Facebook. Governments with access to telecom carrier data could do the same.