Mobile PDA computer system (300) includes a non-secure processor (306), comprising an untrusted microprocessor and an untrusted operating system executing on the untrusted microprocessor. The system also includes a secure processor (302), comprising a trusted microprocessor and a trusted operating system...http://www.google.fr/patents/US7765399?utm_source=gb-gplus-shareBrevet US7765399 - Computer architecture for a handheld electronic device
Computer architecture for a handheld electronic device