Abstract: According to one embodiment, an anonymization apparatus according to an embodiment is configured to execute a determination process, a division process, and a process of recursively executing at least the determination process and the division process, and to thereafter execute anonymization. A number-of-kinds calculation circuit calculates a number of kinds of different attribute values for each of a plurality of attributes, before the determination process is executed. A determination circuit determines the attribute to be noticed, based on also the calculated number of kinds. A sort circuit sorts a plurality of personal data items, based on the calculated number of kinds, before the division process is executed.

Abstract: An anonymization indicator computation system of the embodiment includes a data storing device, an anonymization device, an anonymization degree computation device, and an addition degree computation device. The data storing device stores original data including a value for each item for each person. The anonymization device generates anonymized data from the original data by anonymizing values of part of items in the original data. The anonymization degree computation device computes the anonymization degree indicating a degree of anonymizing data based on the anonymized data. The addition degree computation device computes the data addition degree indicative of a probability of generating the anonymized data from the original data.

Abstract: An authentication system of an embodiment includes a control device, a user terminal, and a service providing device. The control device includes a storage unit, an information acquisition unit, an authentication processing unit, and a control management unit. The information acquisition unit acquires the authentication element for authentication.

Abstract: An authentication system of an embodiment includes a control device, a user terminal, and a service providing device. The control device includes a storage unit, an information acquisition unit, an authentication processing unit, and a control management unit. The information acquisition unit acquires the authentication element for authentication.

Abstract: According to one embodiment, an anonymization apparatus according to an embodiment is configured to execute a determination process, a division process, and a process of recursively executing at least the determination process and the division process, and to thereafter execute anonymization. A number-of-kinds calculation circuit calculates a number of kinds of different attribute values for each of a plurality of attributes, before the determination process is executed. A determination circuit determines the attribute to be noticed, based on also the calculated number of kinds. A sort circuit sorts a plurality of personal data items, based on the calculated number of kinds, before the division process is executed.

Abstract: An anonymization indicator computation system of the embodiment includes a data storing device, an anonymization device, an anonymization degree computation device, and an addition degree computation device. The data storing device stores original data including a value for each item for each person. The anonymization device generates anonymized data from the original data by anonymizing values of part of items in the original data. The anonymization degree computation device computes the anonymization degree indicating a degree of anonymizing data based on the anonymized data. The addition degree computation device computes the data addition degree indicative of a probability of generating the anonymized data from the original data.