Apple's removal of several apps from its mobile store on Thursday shows the challenges iOS developers can face when app guidelines shift.<br />Apple said the apps, which it did not name, used root digital certificates that could expose data to untrusted sources.<br />Root certificates are not a security issue per se, but they do allow an app to initiate a new encrypted connection with a Web service and then view the traffic using its private key.<br />But many technology companies are moving to fully encrypted services, with both content and ads delivered over SSL/TLS.<br />The move was prompted in part by extensive data gathering by U.S. spy agencies revealed by NSA leaker Edward Snowden.
