Access control method, information display device using the same, and information display system
AssigneeHitachi Automotive Sytstems, Ltd.
InventorsTsuneo Sobue, Tatsuaki Osafune
Life of this patent
Estimating the term…
Abstract
When a user carries a mobile terminal with confidential information, such as customer information, stored therein, it is required to maintain information confidentiality and to prevent an unauthorized third party from accessing the confidential information even if the mobile terminal is stolen. According to the disclosed access control method, an encryption key is generated based on a planned route and the information is encrypted. When the user accesses the information, a decryption key is generated based on the actual movement route that is regularly acquired. The encrypted information can be decrypted if the planned route and the movement route match.
Claims6
An access control method for accessing information at a place, to which a user will move, using a portable information display device, the access control method comprising the steps of:
- identifying identifiers of planned waypoints during a move to a destination and an identifier of the destination, the destination being a place where the information will be accessed;
- creating a planned route of the information display device, the planned route represented as a sequence of the identifiers of the planned waypoints and the identifier of the destination;
- generating an encryption key based on the created planned route;
- encrypting the information, which will be accessed, using the generated encryption key;
- repeatedly acquiring position information on the information display device during the move;
- identifying an actual route of the information display device by identifying identifiers of waypoints and an identifier of a current position based on the acquired position information;
- generating a decryption key based on the identified actual route;
- and
- decrypting the encrypted information using the generated decryption key and, if the decryption is successful, permitting the information display device to access the information within an area corresponding to the destination;
- wherein the planned route is created in such a way that the identifiers, which constitute the planned route, are different and
- wherein if duplicated identifiers are included in the actual route, an identifier between the duplicated identifiers and one of the duplicated identifiers are deleted from the sequence of the identifiers.
An access control method for accessing information at a place, to which a user will move, using a portable information display device, the access control method comprising the steps of:
- identifying identifiers of planned waypoints during a move to a destination and an identifier of the destination, the destination being a place where the information will be accessed;
- creating a planned route of the information display device, the planned route represented as a sequence of the identifiers of the planned waypoints and the identifier of the destination;
- generating an encryption key based on the created planned route;
- encrypting the information, which will be accessed, using the generated encryption key;
- repeatedly acquiring position information on the information display device during the move;
- identifying an actual route of the information display device by identifying identifiers of waypoints and an identifier of a current position based on the acquired position information;
- generating a decryption key based on the identified actual route;
- decrypting the encrypted information using the generated decryption key and, if the decryption is successful, permitting the information display device to access the information within an area corresponding to the destination;
- generating the encryption key using planned routes of yesterday and days before if the encryption key cannot be generated using the created planned route;
- and
- generating the decryption key using an actual route, which is long enough for generating the decryption key, from the actual route of yesterday and days before.
An access control method for accessing information at a place, to which a user will move, using a portable information display device, the access control method comprising the steps of:
- identifying identifiers of planned waypoints during a move to a destination and an identifier of the destination, the destination being a place where the information will be accessed;
- creating a planned route of the information display device, the planned route represented as a sequence of the identifiers of the planned waypoints and the identifier of the destination;
- generating an encryption key based on the created planned route;
- encrypting the information, which will be accessed, using the generated encryption key;
- repeatedly acquiring position information on the information display device during the move;
- identifying an actual route of the information display device by identifying identifiers of waypoints and an identifier of a current position based on the acquired position information;
- generating a decryption key based on the identified actual route;
- and
- decrypting the encrypted information using the generated decryption key and, if the decryption is successful, permitting the information display device to access the information within an area corresponding to the destination;
- wherein each of the identifiers of the planned waypoint, destination, waypoint, and current position identifies a partial area generated by dividing an area according to the same criterion;
- if there are a plurality of destinations, determining a size of the partial area so that the identifiers of the destinations become different;
- and
- determining the identifiers of the waypoint and the identifier of the current position, which represent the actual route, based on the determined size.
Dependencies are inferred from the claim text.