Eh, what? "insecure"? On the contrary, traffic between Opera Mini and the Opera proxy servers is always encrypted. HTTP traffic is unencrypted. That makes Opera mini _more_ secure by definition for the huge majority of surfing. Only when you use HTTPS, Opera (the company) has access to the unencrypted data. There is no way around that, technologically, and as they plainly state in the FAQ, if you don't trust them, don't use their browser for secure connections like banking. But you implicitly trust Apple for that, on an iPhone, or your browser vendor in general, unless you check the whole code every time before an update and compile it yourself with a compiler you trust to be secure.