Patent ID: 7739519
Filing Date: 2010-06-15
Classification: G06F,H04M

Abstract:
1. A secure device comprising: a plurality of storage units each having a storage area; an acquiring unit operable to acquire digital data and destination information added to the digital data, the destination information specifying a protection level required for the digital data and being used for determining a storage unit as a storage destination of the digital data; and a processing unit operable to store the digital data in a storage unit determined based on the destination information, wherein each of the plurality of storage units corresponds to a protection level, the destination information specifies whether to embed a digital signature when moving and storing the digital data in a storage unit having a less secured lower protection level than a predetermined protection level, and the processing unit is operable to correspondingly embed the digital signature on the digital data before moving and storing the digital data in said lower-protection level storage unit, according to the destination information and to store the digital data only if authentication has been successful in accordance with the digital signature.