Stamping system and method using a portable communication device

A stamping system for affixing a seal impression on a paper document, comprising:

• a wireless network;
• a server having a computer program for generating randomly a unique file code and a log file, wherein said file code is configured for identifying said paper document, and said log file is configured for recording information about generating said seal impression;
• and
• a portable communication device comprising:
• a central processor;
• an input unit;
• a communication unit for communicating with said server through said wireless network;
• and
• a seal for generating said seal impression to be affixed on said paper document, the seal comprising a plurality of rotatable discs, each of the plurality of rotatable discs comprising engraved characters on an outer surface thereof, each of the plurality of rotatable discs being rotatable to a predetermined position, allowing a combination of the engraved characters of the plurality of rotatable discs to correspond to the file code generated by the server;
• wherein, when receiving a file code generation request, said server generates said file code randomly and sends said file code to said portable communication device, said central processor sends a control signal to said seal after receiving said file code, said seal generates said seal impression that comprises the combination of the engraved characters of the plurality of rotatable discs that corresponding to said file code generated by said server, said communication unit sends a log file generation request to said server, and said server generates said log file in response to said log file generation request.