Mobile phone incorporating security firmware

To method and device for publicizes, and client authentication, a private key for digital credential or usually is received of any private or a privacy information of the user request authentication in an individual SIM card/of intelligent card; the IPsec tunnel arranged, and a mobile phone combination of for security gateway. The employee wherein usual component possibly by and independent personal access device for security gateway method for on the intranet communication of which employer. The capacitor using the employee is a mobile communication network or the rigid network, and PSTN, and intranet access; and borrow any remote host. The solution a safety mobile function a mobile phone or a freestanding access device, and better is a wireless access independent unit realizes, a light security gateway or a firewall of the.