Information processing apparatus and information processing system

An information processing system comprising:

• an information processing apparatus that processes received information;
• and
• an information communication apparatus that sends information to the information processing apparatus,
• wherein the information processing apparatus includes:
• a writing program for writing information to the memory;
• and
• an electronic control unit that is configured to write information to the memory in accordance with the writing program stored in the memory, wherein:
• the memory stores a disabling program for disabling overwriting of the information stored in the memory,
• the electronic control unit disables overwriting of the information stored in the memory in accordance with the disabling program stored in the memory for disablement when writing of the information executed by the electronic control unit is finished,
• the memory stores reference information which is information to be referred to when the electronic control unit executes writing of information, and
• the electronic control unit overwrites the reference information stored in the memory with information that is unrelated to the reference information.