Control device for creating one-time password using pre-input button code, home server for authenticating control device using one-time password, and method for authenticating control device with one-time password

A control device which controls a home network which comprises a slave and a home server which controls the slave, the device comprising:

• an interface which transmits and receives data to and from the home server;
• a key input section comprising buttons which control the home server and outputs a code value corresponding to a selected button;
• a code value authenticator which transfers the data to the home server and authenticates the code value which is output from the key input section;
• a first memory which stores the code value authenticated by the code value authenticator;
• a second memory which stores a one-way function set;
• a password creator which creates a one-time password using a pointer value indicating an area in the first memory storing a first code value, the code value, and a one-way function selected from the one-way function set;
• and
• a controller which generates a packet containing the pointer value, a one-way function number, and the one-time password, and requests authentication by transferring the generated packet to the home server via the interface.

A home server which controls a slave under control of a control device in a home network system which comprises the control device and a slave, comprising:

• a server interface which receives from the control device a pointer value indicating an area of a first memory of the control device, a one-way function number, and a first password;
• a first server memory which stores a code value corresponding to a button input at the control device;
• a second server memory which stores a one-way function set;
• a calculator which calculates a second password using the code value stored in an area indicated by the pointer value in the first server memory, the pointer value, and a one-way function which corresponds to the one-way function number in the one-way function set;
• and
• a home server controller which authenticates the control device if the first password and the second password match.