Patent ID: 8782756

Claim:
A time clock capable of outputting data through a time-clock wire connector into a portable-electronic-memory wire connector of a portable electronic memory connected to the time clock, the portable electronic memory being connectable to the time clock for data transfer therebetween, and disconnectable from the time clock, the time clock comprising: a clock portion including an oscillator and a counter, to provide a current time; the time-clock wire connector; a printer that, when a time card is inserted into an insertion opening of the time clock, prints the current time on the time card, and also stores the current time in a time-clock memory; an authentication portion of the time clock, authenticating whether or not the portable electronic memory is valid as an output destination to which the data is output, wherein the authentication portion authenticates the portable electronic memory on the basis of an authentication datum stored in the portable electronic memory; and a controller determining whether or not the data is to be output on the basis of the authentication result, when the portable electronic-memory-connector is connected with the time-clock connector; wherein the authentication portion authenticates the portable electronic memory on the basis of an identifier included in the authentication datum stored in the portable electronic memory, and further authenticates the portable electronic memory by a password input to the time clock by a user of the portable electronic memory.