Wrong. The first jailbreak was done because the iPhone trusted the restore mode commands coming from iTunes. The protocol was totally reworked so that the iPhon

Wrong. The first jailbreak was done because the iPhone trusted the restore mode commands coming from iTunes. The protocol was totally reworked so that the iPhone would only run some canned scripts. This did nothing to improve device security (it pretty much only enabled the jailbreak), but Apple fixed it fast.