In this thesis, I dealt whether the disposal of the Nominal-Trusted real estate constitutes property crime or not. Property crime such as Embezzlement or Breach of trust should protect the relationship worthy of being protected by Criminal Law. Even though the nominal trust agreement about the real estate is not Kondiktio wegen verwerflichen Empfanges, I think Act on the Registration of Real Estate under Actual Titleholder’s name”(below abbreviated as ‘Actual Name Law’) makes the nominal trust agreement be not worthy of being protected by Criminal Law. So except some cases Actual Name Law allows, the disposal of the Nominal-Trusted real estate does not constitute property crime such as Embezzlement or Breach of trust. *

In this article, we analyze the decision of the Supreme Court in Korea with respect to the unauthorized modification of information and the immediacy of property disposal in a computer fraud critically. In the mentioned case, the defendant was charged with unlawful behavior to change the information by installing a hacking program on electronic bidding system of an administrative office. The author evaluated the defendant‘s conduct at issue not as an unauthorized change of information, but as an input of false information or illegal command input for computer. In terms of the immediacy of property disposal, this paper contends that we can’t say that computer fraud doesn’t hold, without exception, if a person involved in the property disposal process. In order to determine whether the computer fraud is established, we have to analyze the contents of the involved individual’s action in detail.