I'm confident...
whether it's a transaction on eBay, PayPal, BofA, or Wells Fargo, that my transaction on my MacBook, Mac Pro or iPhone are pretty secure. I've been conducting "business as usual" on my iPhone, just as I do on my MacBook & Mac Pro, and have not had a problem with WiFi, EDGE or my DSL at home. I've been doing financial transactions via the internet since the early '90's and feel more confident via the internet than I do with the telephone! I'm yet, to have ID Theft or Fraud, since I have protection via my banks and credit cards and as soon as a transaction occurs, I'm notified via email alerts right to my iPhone! Not sure if this answers your question, but it's just MHO---😎