Waxman sometimes logs into his bank with his iPhone and is concerned about malware. Apple must approve all apps in the app store, so there aren't viruses to warrant needing an antivirus program. The apps are also segregated with no data sharing between them. So it's a pretty closed system. Android, by contrast, allows for the sale of antivirus apps because it's pretty wide open. The bigger issue is the wireless networking that he's using. But the bank data is encrypted, so there's no real issue.