Printing system and printer with electronic signature capability and method thereof

A printer with an electronic signature capability, comprising:

• a memory interface to which a portable memory is connected detachably for storing an encrypted electronic signature;
• a composition unit for receiving the encrypted electronic signature from the memory interface when the portable memory is directly connected to the memory interface and composing print data with the received electronic signature;
• and
• a printing unit for printing the print data bearing the electronic signature,
• wherein the electronic signature is encrypted with a password, and
• if a user input password and password of the electronic signature match, the composition unit is configured to decrypt the encrypted electronic signature and compose the print data to be printed with the electronic signature stored in the portable memory, and
• if the user input password and password of the electronic signature do not match, the electronic signature is not printed.

An electronic signature printing method, comprising the steps of:

• storing an encrypted electronic signature in a portable memory;
• and
• controlling a printer for receiving the encrypted electronic signature from the portable memory when the portable memory is directly connected to a memory interface of the printer, composing print data with the electronic signature, and executing a print operation,
• wherein the electronic signature is encrypted with a password, and
• wherein the portable memory is detachably connected to the memory interface, and
• if a user input password and password of the electronic signature match, decrypting the encrypted electronic signature and composing the print data to be printed with the electronic signature stored in the portable memory, and
• if the user input password and password of the electronic signature do not match, the electronic signature is not printed.