公开(公告)号：US20090122981A1

公开(公告)日：2009-05-14

申请号：US11795770

申请日：2005-12-09

申请人： Yuichi Kaji

发明人： Yuichi Kaji

IPC分类号： H04L9/08 ,  H04L9/14

CPC分类号： H04L9/302 ,  H04L9/0891 ,  H04L2209/60 ,  H04L2209/80

摘要： A scramble key generation unit generates scramble keys (individual encryption keys) which are different from one another and which are for encrypting and decrypting distributing data, by subjecting a predetermined initial encryption key at least once to a unidirectional reverse replacement and at least once to a trapdoor-equipped unidirectional replacement. A time key generation unit generates a time key (master encryption key) for regenerating the scramble keys, by subjecting any of the scramble keys generated by the scramble key generation unit at least once to the unidirectional reverse replacement. Thus, it is possible to efficiently and flexibly generate the individual encryption keys for encrypting and decrypting the distribution data, and master encryption key capable of regenerating some of the individual encryption keys.

摘要翻译： 加扰密钥生成单元通过使预定的初始加密密钥至少一次进行单向反向替换，并且至少一次到达一次以产生彼此不同并且用于加密和解密分发数据的加密密钥（各个加密密钥） 陷门装置的单向更换。 时间密钥生成单元生成用于再生加密密钥的时间密钥（主加密密钥），通过将加扰密钥生成单元生成的加扰密钥至少一次地进行单向反向替换。 因此，能够有效且灵活地生成用于加密和解密分发数据的各个加密密钥，以及能够再生一些各个加密密钥的主加密密钥。

公开(公告)号：US08184813B2

公开(公告)日：2012-05-22

申请号：US11795770

申请日：2005-12-09

申请人： Yuichi Kaji

发明人： Yuichi Kaji

IPC分类号： H04L9/00

CPC分类号： H04L9/302 ,  H04L9/0891 ,  H04L2209/60 ,  H04L2209/80

摘要： A scramble key generation unit generates scramble keys (individual encryption keys) which are different from one another and which are for encrypting and decrypting distributing data, by subjecting a predetermined initial encryption key at least once to a unidirectional reverse replacement and at least once to a trapdoor-equipped unidirectional replacement. A time key generation unit generates a time key (master encryption key) for regenerating the scramble keys, by subjecting any of the scramble keys generated by the scramble key generation unit at least once to the unidirectional reverse replacement. Thus, it is possible to efficiently and flexibly generate the individual encryption keys for encrypting and decrypting the distribution data, and master encryption key capable of regenerating some of the individual encryption keys.

摘要翻译： 加扰密钥生成单元通过使预定的初始加密密钥至少一次进行单向反向替换，并且至少一次到达一次以产生彼此不同并且用于加密和解密分发数据的加密密钥（各个加密密钥） 陷门装置的单向更换。 时间密钥生成单元生成用于再生加密密钥的时间密钥（主加密密钥），通过将加扰密钥生成单元生成的加扰密钥至少一次地进行单向反向替换。 因此，能够有效且灵活地生成用于加密和解密分发数据的各个加密密钥，以及能够再生一些各个加密密钥的主加密密钥。

公开(公告)号：US20070044157A1

公开(公告)日：2007-02-22

申请号：US10556068

申请日：2004-04-27

申请人： Daigo Taguchi ,  Yuichi Kaji ,  Jun Noda

发明人： Daigo Taguchi ,  Yuichi Kaji ,  Jun Noda

IPC分类号： H04L9/32

CPC分类号： G06Q30/06 ,  G06F21/10

摘要： A server (1) generates delivery data obtained by adding distribution control information which designates the possibility/impossibility of data transfer, the necessity/unnecessity of encryption, the possibility/impossibility of server inquiry, and the like to contents data such as digital contents, an electronic ticket, or the like and delivers the delivery data to a mobile information terminal (2). The delivery data is stored in the mobile information terminal (2), and freely used by a service user. Although the delivery data can be backed up in another user information terminal, restoration and transfer of the delivery data are restricted according to the added distribution control information.

摘要翻译： 服务器（1）通过将指定数据传送的可能性/不可能性的分配控制信息，加密的必要性/不必要性，服务器查询的可能性/不可能性等附加到诸如数字内容的内容数据， 电子票等，并将传送数据传送到移动信息终端（2）。 传送数据存储在移动信息终端（2）中，由服务用户自由使用。 虽然可以在另一用户信息终端中备份传送数据，但是根据添加的分发控制信息来限制传送数据的恢复和传送。