Patent ID: 8032929

Claim:
A safety judgment method for judging safety of an information processing apparatus connected to an authentication apparatus through a communication network, comprising: receiving transaction information through the authentication apparatus, the transaction information accepted by the information processing apparatus; receiving environment information including at least one kind of information about the information processing apparatus, information about peripheral equipment connected to the information processing apparatus, and information about software installed in the information processing apparatus; storing relationship information in the authentication apparatus in advance, which represents relationships between transaction information and environment information; determining whether a relationship between the environment information and the transaction information corresponds to relationship information stored in the authentication apparatus in advance, which represents relationships between transaction information and environment information; and outputting first information for allowing carrying out of a transaction based on the transaction information, when it is determined that the relationship corresponds to the relationship information stored in the authentication apparatus, and second information for banning carrying out of the transaction based on the transaction information, when it is determined that the relationship does not correspond to the relationship information stored in the authentication apparatus.