There is the Act on promotion of information and communications network utilization and information protection, etc where it may be said that it is a fundamental law of the personal information protection. An authorized electronic document system and the personal information protection to be concerned with are regulated by the Basic Law on electronic documents and electronic transactions. However, the Act on promotion of information and communications network utilization and information protection, etc which is a fundamental law must be considered together. This thesis examined a personal information protection rule of the Basic Law on electronic documents and electronic transactions and the rule in the business article of agency of authorized electronic document broadcast. There are problems to infringe minimum collection rule and resident registration number collection restrictions rule. In addition, this thesis pointed out a problem in the business that registration made ends meet by the caretaker which was not a charge organization in the registration procedure of the authorized electronic address. This is wrong with a rule of the Basic Law on electronic documents and electronic transactions. It is thought that it do not become if not settled by the reinforcement of the personal information protection system in business and the supplement of the legislation.
This thesis watched the issue of information protection when we built the inquiry system of the authorized electronic address. The information protection problem when we performed an inquiry of an authorized electronic address might divide it with three kinds. At first, in the case of an individual, we built the inquiry system of so-called opt-in method. Such a method will contribute to safe protection of the personal information. Second, this thesis suggested that we built the inquiry system of the opt-out method in the case of a corporation. Third, generally, it will be difficult to look at the national authorized electronic address in a state secret. Therefore it is thought that we can build an inquiry system.