Abstract: An information management system includes a portion for receiving rule information indicating an encryption rule of information defined for each secret level that is a level of wanting to keep information secret and encryption data necessary for encrypting information in accordance with the rule from an encryption support system, a portion for storing classification of information managed by the information management system for each classification in connection with the secret level, a portion for encrypting information managed by the information management system by using the encryption data of the secret level corresponding to the classification of the received information, a portion for storing the encrypted information using the encryption data and a portion for transmitting process information indicating the encryption process to the encryption support system so as to receive a check whether or not the encryption of the information was performed in accordance with the rule.