公开(公告)号：US20070150735A1

公开(公告)日：2007-06-28

申请号：US10573684

申请日：2004-10-18

申请人： Yuichi Futa ,  Masato Yamamichi ,  Masami Yamamichi ,  Satomi Yamamichi ,  Keiko Yamamichi ,  Motoji Ohmori ,  Makoto Tatebayashi

发明人： Yuichi Futa ,  Masato Yamamichi ,  Masami Yamamichi ,  Satomi Yamamichi ,  Keiko Yamamichi ,  Motoji Ohmori ,  Makoto Tatebayashi

IPC分类号： H04L9/00

CPC分类号： H04L9/0844 ,  H04L9/30 ,  H04L2209/605 ,  H04L2209/80

摘要： In an encrypted communication system that includes a first and a second device, the first device encrypts a key using a public key of the second device to generate 1st encrypted data, which is then transmitted to the second device, receives 2nd encrypted data from the second device, which is then decrypted using a secret key of the first device to obtain a 2nd key, and generates, based on the 1st and 2nd keys, a 1st encryption key for use in communication with the second device. The second device encrypts a 3rd key using a public key of the first device to generate the 2nd encrypted data, which is then transmitted to the first device, receives the 1st encrypted data, which is then decrypted using a secret key of the second device to obtain a 4th key, and generates, based on the 3rd and 4th keys, a 2nd encryption key for use in communication with the first device. The first and second devices perform encrypted communication using the 1st and 2nd encryption keys.

摘要翻译： 在包括第一和第二设备的加密通信系统中，第一设备使用第二设备的公开密钥对密钥进行加密以产生第一加密数据，然后将其传送到第二设备，从第二设备接收第二加密数据 设备，然后使用第一设备的秘密密钥解密以获得第二密钥，并且基于第一和第二密钥生成用于与第二设备通信的第一加密密钥。 第二设备使用第一设备的公开密钥对第三密钥进行加密以生成第二加密数据，然后将其传送到第一设备，接收第一加密数据，然后使用第二设备的秘密密钥将其解密 获得第四密钥，并且基于第三和第四密钥生成用于与第一设备通信的第二加密密钥。 第一和第二设备使用第一和第二加密密钥执行加密通信。

公开(公告)号：US20060171530A1

公开(公告)日：2006-08-03

申请号：US10559725

申请日：2004-06-14

申请人： Yuichi Futa ,  Masato Yamamichi ,  Masami Yamamichi ,  Satomi Yamamichi ,  Keiko Yamamichi ,  Motoji Ohmori ,  Makoto Tatebayashi

发明人： Yuichi Futa ,  Masato Yamamichi ,  Masami Yamamichi ,  Satomi Yamamichi ,  Keiko Yamamichi ,  Motoji Ohmori ,  Makoto Tatebayashi

IPC分类号： H04L9/28

CPC分类号： H04L9/3236 ,  H04L9/3093 ,  H04L2209/60

摘要： An encroption transmission apparatus and an encryption reception apparatus avoid attack that takes advantage of re-transmission request. A server apparatus encrypts a content key five times, thereby generating five encrypted content keys, calculates a hash value of the content key, and transmits the five encrypted content keys and the hash value. An image playback apparatus receives the five encrypted content keys and the has value, decrypts the five encrypted content keys thereby generating five content keys, calculates hash values each corresponding to the generated content keys, and compares the calculated hash values with the received hash value respectively. If at least one of the five calculated hash values matches the received hash value, the corresponding content key is considered correct. Conversely, if none of the five calculated hash values matches the received hash value, it is considered a decryption error.

摘要翻译： 侵扰传输装置和加密接收装置避免利用重传请求的攻击。 服务器装置对内容密钥进行五次加密，从而生成五个加密的内容密钥，计算内容密钥的哈希值，并发送五个加密内容密钥和哈希值。 图像重放装置接收五个加密的内容密钥并具有值，对五个加密的内容密钥进行解密从而生成五个内容密钥，计算与生成的内容密钥相对应的哈希值，分别将计算的哈希值与接收到的散列值进行比较 。 如果五个计算的散列值中的至少一个与接收的散列值匹配，则相应的内容密钥被认为是正确的。 相反，如果五个计算的散列值中没有一个与接收的散列值匹配，则认为它是解密错误。

公开(公告)号：US07603554B2

公开(公告)日：2009-10-13

申请号：US10559725

申请日：2004-06-14

申请人： Yuichi Futa ,  Masato Yamamichi ,  Masami Yamamichi, legal representative ,  Satomi Yamamichi, legal representative ,  Keiko Yamamichi, legal representative ,  Motoji Ohmori ,  Makoto Tatebayashi

发明人： Yuichi Futa ,  Masato Yamamichi ,  Motoji Ohmori ,  Makoto Tatebayashi

IPC分类号： H04L9/32

CPC分类号： H04L9/3236 ,  H04L9/3093 ,  H04L2209/60

摘要： An encryption transmission apparatus and an encryption reception apparatus avoid attack that takes advantage of a re-transmission request. A server apparatus encrypts a content key five times, thereby generating five encrypted content keys, calculates a hash value of the content key, and transmits the five encrypted content keys and the hash value. An image playback apparatus receives the five encrypted content keys and the hash value, decrypts the five encrypted content keys thereby generating five content keys, calculates hash values, each corresponding to the generated content keys, and compares the calculated hash values with the received hash value, respectively. If at least one of the five calculated hash values matches the received hash value, the corresponding content key is considered correct. Conversely, if none of the five calculated hash values matches the received hash value, it is considered a decryption error.

摘要翻译： 加密发送装置和加密接收装置避免利用重发请求的攻击。 服务器装置对内容密钥进行五次加密，从而生成五个加密的内容密钥，计算内容密钥的哈希值，并发送五个加密内容密钥和哈希值。 图像重放装置接收五个加密的内容密钥和哈希值，对五个加密的内容密钥进行解密，从而生成五个内容密钥，计算与生成的内容密钥相对应的哈希值，并将计算的哈希值与接收到的散列值进行比较 ， 分别。 如果五个计算的散列值中的至少一个与接收的散列值匹配，则相应的内容密钥被认为是正确的。 相反，如果五个计算的散列值中没有一个与接收的散列值匹配，则认为它是解密错误。

公开(公告)号：US07394902B2

公开(公告)日：2008-07-01

申请号：US10680294

申请日：2003-10-08

申请人： Masato Yamamichi ,  Yuichi Futa ,  Motoji Ohmori ,  Makoto Tatebayashi

发明人： Masato Yamamichi ,  Yuichi Futa ,  Motoji Ohmori ,  Makoto Tatebayashi

IPC分类号： H04L9/00 ,  H04L9/32

CPC分类号： H04L9/3093 ,  H04L2209/08 ,  H04L2209/56 ,  H04L2209/60

摘要： The present invention pertains to a transmission apparatus for generating an encrypted text by encrypting a plaintext, which includes a parameter storage unit for storing a random parameter (the number of terms whose coefficients indicate 1) adapted to an encryption key and an encryption apparatus and a decryption apparatus; an encryption unit for generating, from the plaintext, the encrypted text using the encryption key and the random parameter stored in the parameter storage unit, complying with an encryption algorithm based on the NTRU™ method; and a key updating unit for updating the random parameter stored in the parameter storage unit and the encryption key, as time passes.

摘要翻译： 本发明涉及一种用于通过加密明文生成加密文本的发送装置，该明文包括用于存储适于加密密钥的随机参数（系数表示1的术语数量）和加密装置的参数存储单元，以及 解密装置; 使用加密密钥和存储在参数存储单元中的随机参数从明文生成加密文本的加密单元，符合基于NTRU TM方法的加密算法; 以及密钥更新单元，用于随着时间的过去更新存储在参数存储单元中的随机参数和加密密钥。

公开(公告)号：US08132024B2

公开(公告)日：2012-03-06

申请号：US10796214

申请日：2004-03-10

申请人： Toshihisa Nakano ,  Masato Yamamichi ,  Masami Yamamichi, legal representative ,  Satomi Yamamichi, legal representative ,  Keiko Yamamichi, legal representative ,  Yuichi Futa ,  Motoji Ohmori ,  Makoto Tatebayashi ,  Shunji Harada ,  Kaoru Murase

发明人： Toshihisa Nakano ,  Masato Yamamichi ,  Yuichi Futa ,  Motoji Ohmori ,  Makoto Tatebayashi ,  Shunji Harada ,  Kaoru Murase

IPC分类号： G06F21/00

CPC分类号： H04L9/0822 ,  G11B20/00086 ,  G11B20/00253 ,  H04L9/3268 ,  H04L2209/60

摘要： A recording and reproduction apparatus for preventing illegitimate use of contents. A recording medium stores an inherent number in an unrewritable area. The recording apparatus writes media key data and an encrypted content onto the recording medium. The media key data includes encrypted media keys generated by (i) for each of unrevoked reproduction apparatuses, encrypting a media key using a device key of the unrevoked reproduction apparatus respectively, and (ii) for each of revoked reproduction apparatuses, encrypting detection information using a device key of the revoked reproduction apparatus. The reproduction apparatus decrypts the encrypted media key using a device key to generate a decryption media key, judges whether the decryption media key is the detection information, and prohibits the encrypted content recorded on the recording medium from being decrypted when judged in the affirmative.

摘要翻译： 一种用于防止非法使用内容的记录和再现装置。 记录介质将固有数量存储在不可重写区域中。 记录装置将媒体密钥数据和加密内容写入记录介质。 媒体密钥数据包括由（i）针对每个未被复制的再现设备生成的加密的媒体密钥，分别使用未被复制的设备的设备密钥加密媒体密钥，以及（ii）对于每个撤销的再现设备，使用 撤销再现设备的设备密钥。 再现装置使用设备密钥对加密的媒体密钥进行解密以生成解密媒体密钥，判断解密媒体密钥是否为检测信息，并且当以肯定判断时，禁止记录在记录介质上的加密内容被解密。

公开(公告)号：US07813512B2

公开(公告)日：2010-10-12

申请号：US10573684

申请日：2004-10-18

申请人： Yuichi Futa ,  Masato Yamamichi ,  Masami Yamamichi, legal representative ,  Satomi Yamamichi, legal representative ,  Keiko Yamamichi, legal representative ,  Motoji Ohmori ,  Makoto Tatebayashi

发明人： Yuichi Futa ,  Masato Yamamichi ,  Motoji Ohmori ,  Makoto Tatebayashi

IPC分类号： H04L9/08

CPC分类号： H04L9/0844 ,  H04L9/30 ,  H04L2209/605 ,  H04L2209/80

摘要： In an encrypted communication system that includes a first and a second device, the first device encrypts a 1st key using a public key of the second device to generate 1st encrypted data, which is then transmitted to the second device, receives 2nd encrypted data from the second device, which is then decrypted using a secret key of the first device to obtain a 2nd key, and generates, based on the 1st and 2nd keys, a 1st encryption key for use in communication with the second device. The second device encrypts a 3rd key using a public key of the first device to generate the 2nd encrypted data, which is then transmitted to the first device, receives the 1st encrypted data, which is then decrypted using a secret key of the second device to obtain a 4th key, and generates, based on the 3rd and 4th keys, a 2nd encryption key for use in communication with the first device. The first and second devices perform encrypted communication using the 1st and 2nd encryption keys.

摘要翻译： 在包括第一和第二设备的加密通信系统中，第一设备使用第二设备的公开密钥对第一密钥进行加密，以生成第一加密数据，然后将其传送到第二设备，从第二设备接收第二加密数据 第二设备，然后使用第一设备的秘密密钥解密以获得第二密钥，并且基于第一和第二密钥生成用于与第二设备通信的第一加密密钥。 第二设备使用第一设备的公开密钥对第三密钥进行加密以生成第二加密数据，然后将其传送到第一设备，接收第一加密数据，然后使用第二设备的秘密密钥将其解密 获得第四密钥，并且基于第三和第四密钥生成用于与第一设备通信的第二加密密钥。 第一和第二设备使用第一和第二加密密钥执行加密通信。

公开(公告)号：US07702109B2

公开(公告)日：2010-04-20

申请号：US10548265

申请日：2004-03-11

申请人： Yuichi Futa ,  Masato Yamamichi ,  Masami Yamamichi, legal representative ,  Satomi Yamamichi, legal representative ,  Keiko Yamamichi, legal representative ,  Motoji Ohmori ,  Masaya Yamamoto ,  Makoto Tatebayashi

发明人： Yuichi Futa ,  Masato Yamamichi ,  Motoji Ohmori ,  Masaya Yamamoto ,  Makoto Tatebayashi

IPC分类号： H04L9/00

CPC分类号： H04N21/4325 ,  G11B20/00086 ,  G11B20/00173 ,  G11B20/0021 ,  G11B20/00246 ,  G11B20/00362 ,  G11B20/00492 ,  H04N21/26613 ,  H04N21/835

摘要： A content recording/reproducing system, which records and reproduces a sub-content relating to a main content, includes a distribution device, first and second recording media, a recording device and a reproducing device. The first recording medium that is non-rewritable prestores key data based on which a public key is derivable, and the main content. The distribution device outputs verification information that includes the sub-content and is generated by applying a digital signature to relative information relating to the sub-content based on a secret key corresponding to the public key. The recording device acquires and records the verification information on the second recording medium that is rewritable. The reproducing device acquires the key data from the first recording medium and the verification information from the second recording medium, derives the public key from the key data, verifies the verification information using the public key, and reproduces the sub-content if the verification succeeds.

摘要翻译： 记录和再现与主要内容相关的子内容的内容记录/再现系统包括分发装置，第一和第二记录介质，记录装置和再现装置。 不可重写的第一种记录介质预先存储基于该公钥的可导出的密钥数据，以及主要内容。 分发装置输出包含子内容的验证信息，并且通过基于与公开密钥相对应的秘密密钥将数字签名应用于与子内容相关的相关信息来生成。 记录装置在可重写的第二记录介质上获取并记录验证信息。 再现装置从第一记录介质获取密钥数据和来自第二记录介质的验证信息，从密钥数据中导出公共密钥，使用公钥验证验证信息，并且如果验证成功则再现子内容 。

公开(公告)号：US07929688B2

公开(公告)日：2011-04-19

申请号：US10552586

申请日：2004-04-14

申请人： Masato Yamamichi ,  Masami Yamamichi, legal representative ,  Satomi Yamamichi, legal representative ,  Keiko Yamamichi, legal representative ,  Yuichi Futa ,  Motoji Ohmori ,  Makoto Tatebayashi

发明人： Masato Yamamichi ,  Yuichi Futa ,  Motoji Ohmori ,  Makoto Tatebayashi

IPC分类号： H04K3/00 ,  H04L9/00

CPC分类号： H04L9/3093

摘要： A parameter generation apparatus for generating parameters causing no decryption error for an NTRU cryptosystem so that an encrypted communication can be carried out between an encryption apparatus and a decryption apparatus in a secure and reliable manner. The parameter generation apparatus includes: a provisional parameter generation unit operable to generate a set of provisional parameters that do not cause any decryption errors, based on error condition information that is provided in advance, the error condition information indicating a condition for causing no decryption error; and an output parameter generation unit operable to generate an output parameter that does not cause any decryption errors, using the set of provisional parameters, based on a lattice constant that is calculated from the set of provisional parameters.

摘要翻译： 一种用于产生对NTRU密码系统不产生解密错误的参数的参数产生装置，使得可以以安全可靠的方式在加密装置和解密装置之间执行加密通信。 该参数生成装置包括：临时参数生成部，其基于预先提供的错误条件信息生成不产生解密错误的一组临时参数，该错误条件信息表示不进行解密错误的条件 ; 以及输出参数生成单元，其可以基于从所述一组临时参数计算的晶格常数，使用所述一组临时参数来生成不引起任何解密错误的输出参数。

公开(公告)号：US07155610B2

公开(公告)日：2006-12-26

申请号：US10020308

申请日：2001-12-18

申请人： Masato Yamamichi ,  Yuichi Futa ,  Motoji Ohmori ,  Makoto Tatebayashi

发明人： Masato Yamamichi ,  Yuichi Futa ,  Motoji Ohmori ,  Makoto Tatebayashi

IPC分类号： H04L9/00

CPC分类号： H04L9/3236

摘要： A transmission apparatus performs a one-way operation on plaintext to generate a first value and transmits the first value, generates first additional information, performs an invertible operation on the plaintext and first additional information to generate connected information, encrypts the connected information using an encryption algorithm to generate ciphertext, and transmits the ciphertext. A reception apparatus receives the first value and the ciphertext, generates second additional information identical to the first additional information, decrypts the ciphertext using a decryption algorithm, which is an inverse-conversion of the encryption algorithm, to generate decrypted connected information, decrypts the decrypted connected information and the second additional information according to an inverse of the invertible operation to generate decrypted text, performs the one-way operation on the decrypted text to generate a second value, compares the first and second values, and judges that the decrypted text is valid only when the first and second values match.

摘要翻译： 发送装置对明文执行单向操作以生成第一值并发送第一值，生成第一附加信息，对明文执行可逆操作和第一附加信息以生成连接信息，使用加密来加密所连接的信息 算法生成密文，并发送密文。 接收装置接收第一值和密文，生成与第一附加信息相同的第二附加信息，使用作为加密算法的逆变换的解密算法对密文进行解密，生成解密的连接信息，解密解密的 连接信息和第二附加信息，根据可逆操作的反向产生解密文本，对解密文本执行单向操作以生成第二值，比较第一和第二值，并且判断解密文本是 仅当第一个和第二个值匹配时才有效。

公开(公告)号：US07886365B2

公开(公告)日：2011-02-08

申请号：US10457466

申请日：2003-06-10

申请人： Yuichi Futa ,  Motoji Ohmori ,  Hirohito Kitatora ,  Natsume Matsuzaki ,  Makoto Tatebayashi ,  Kaoru Yokotoa

发明人： Yuichi Futa ,  Motoji Ohmori ,  Hirohito Kitatora ,  Natsume Matsuzaki ,  Makoto Tatebayashi ,  Kaoru Yokotoa

IPC分类号： G06F21/24 ,  H04L12/28 ,  H04L29/06

CPC分类号： H04L12/2834 ,  H04L12/2803 ,  H04L12/2812 ,  H04L12/2823 ,  H04L63/0428 ,  H04L63/0823 ,  H04L2463/101

摘要： In a content-log analyzing system, content includes additional information indicating, according to a property of the content, whether or not to record communication of the content in a content-log. When transmitting content to a TV or a PC, a data-communication controlling device judges whether or not to record the communication in a content-log based upon additional information of the content, and when judging affirmatively, generates and stores content-log information. A content-log analyzing server obtains the content-log stored in the data-communication controlling device, and analyzes the obtained content-log.

摘要翻译： 在内容日志分析系统中，内容包括附加信息，其指示根据内容的属性，是否在内容日志中记录内容的通信。 当数据通信控制装置向TV或PC发送内容时，根据内容的附加信息来判定是否在内容日志中记录通信，在判断时，生成并存储内容日志信息。 内容日志分析服务器获取存储在数据通信控制装置中的内容日志，并分析所获得的内容日志。