Devices, system, and methods of secure entry and handling of passwords and Personal Identification Numbers, as well as for secure local storage, secure user authentication, and secure payment via mobile devices and via payment terminals. The flow control method includes receiving a wireless USB communication management packet including channel time allocation information and information on a data transfer direction for one or more wireless USB devices that can communicate with a wireless USB host. Additional systems and methods are also presented. The restricting portion in the second position restricts the outer lead to be inserted to the insertion path and restricts expansion of the connection terminal that holds the outer lead. The links for keying information or material are configured to ensure the security of the keying information or material. After that, the reference beam and the modulated signal beam are irradiated to a convergent unit, and are directed to the holographic recording medium for forming the holographic interference pattern.