Invention Grant
US08737611B2 Encryption device and medium, decryption device and method, data delivery device, data receiving device, and data delivery system
有权
加密设备和介质，解密设备和方法，数据传送设备，数据接收设备和数据传送系统
- Patent Title: Encryption device and medium, decryption device and method, data delivery device, data receiving device, and data delivery system
- Patent Title (中): 加密设备和介质，解密设备和方法，数据传送设备，数据接收设备和数据传送系统
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Application No.: US12289427Application Date: 2008-10-28
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Publication No.: US08737611B2Publication Date: 2014-05-27
- Inventor: Yoshihiro Shintani
- Applicant: Yoshihiro Shintani
- Applicant Address: JP Tokyo
- Assignee: Oki Electric Industry Co., Ltd.
- Current Assignee: Oki Electric Industry Co., Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Rabin & Berdo, P.C.
- Priority: JP2007-334998 20071226
- Main IPC: H04N7/167
- IPC: H04N7/167 ; G06F11/30
Abstract:
A data delivery device divides data representing a single entity into a plurality of data items, encrypts the data items, and delivers the encrypted data items to a data receiving device. The encryption device in the data delivery device includes a first encryptor that encrypts a first set of the data items, leaving a second set of the data items unencrypted. A storage unit stores the encrypted first set of data items and the unencrypted second set of data items, pending delivery to the data receiving device. A second encryptor encrypts the second set of data items in real time when they are taken from the storage unit and delivered to the data receiving device. By combining pre-encryption and real-time encryption, the encryption device attains a high level of security with only a moderate real-time processing load.
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