CONTENT PROTECTION SYSTEM
    22.
    发明公开
    CONTENT PROTECTION SYSTEM 审中-公开
    INHALTSSCHUTZSYSTEM

    公开(公告)号:EP1624608A1

    公开(公告)日:2006-02-08

    申请号:EP04719578.9

    申请日:2004-03-11

    IPC分类号: H04L9/08

    摘要: The invention provides a recording apparatus and a reproduction apparatus that are able to prevent illegitimate use of contents. A recording medium stores therein a medium inherent number in the 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 respectively. 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 or not, and prohibits the encrypted content recorded on the recording medium from being decrypted when having judged in the affirmative.

    摘要翻译: 本发明提供能够防止非法使用内容的记录装置和再现装置。 记录介质在其中存储不可重写区域中的媒体固有数字。 记录装置将媒体密钥数据和加密内容写入到记录介质上。 媒体密钥数据包括通过(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 解除再现设备的设备密钥。 再现装置使用设备密钥解密加密的媒体密钥以生成解密媒体密钥,判断解密媒体密钥是否为检测信息,并且当在 肯定。

    KEY SHARING SYSTEM, SHARED KEY CREATION DEVICE, AND SHARED KEY RESTORATION DEVICE
    24.
    发明公开
    KEY SHARING SYSTEM, SHARED KEY CREATION DEVICE, AND SHARED KEY RESTORATION DEVICE 审中-公开
    系统,用于按键使用,生产设备技术一起使用及主要恢复一起为使用的关键

    公开(公告)号:EP1569378A1

    公开(公告)日:2005-08-31

    申请号:EP03812329.5

    申请日:2003-11-28

    IPC分类号: H04L9/08 G09C1/00

    摘要: Provided is a content distribution system that prevents different keys to be derived between an encryption apparatus and a decryption apparatus. A random-number generating unit 112d, in an encryption apparatus 110d, generates a random number s, and a first function unit 113d generates a functional value G (s) of the random number s, and generates a verification value a and a shared key K from the functional value G(s). An encryption unit 114d generates a first cipher text c1 of the verification value a using a public-key polynomial h, and a second function unit 115d generates a functional value H(a,c1) of the verification value a and the first cipher text c1, and a random-number mask unit 116d generates a second cipher text c2=s xor H(a,c1). A decryption unit 123d, in a decryption apparatus 120d, decrypts the first cipher text c1 using a secret-key polynomial f, to generate a decryption verification value a'. A third function unit 124d generates a functional value H(a',c1) of the decryption verification value a' and the first cipher text c1, and a random-number mask removal unit 125d generates a decryption random number s'=c2 xor H(a',c1). A fourth function unit 126d generates a hash functional value G (s') of the decryption random number s', and generates a verification value a'' and a shared key K' from the functional value G(s'). A comparison unit 127d outputs the shared key K' if the decryption verification value a' is equal to the verification value a''.

    摘要翻译: 加密装置和解密装置之间进行衍生本发明提供一种内容分发系统确实可以防止不同的密钥。 随机数产生单元112D在加密装置110d中基因速率的随机数s以及了firstFunction单元113D基因率随机数s和基因率的验证值的函数值G(S)和共享密钥 ķ从函数值G(S)。 加密单元114d的基因率的验证值的第一密文C1中的使用公开密钥多项式h,和一个第二功能单元115D基因率的函数值H(A,C1)的验证值和第一密文C1的 和随机数掩模单元116D生成第二密文C2 = S XOR H(A,C1)。 解密单元123D,在解密装置120D,解密第一密文C1使用秘密密钥多项式f,以产生解密验证值A”。 第三个功能单元124D生成的函数值H(A“ c1)中的解密验证值a”和第一密文C1和随机数掩模去除单元125D生成一个解密的随机数S'= C2 XORħ (A”,C1)。 第四功能单元126D基因率的哈希函数值G(S“)的解密随机数s”,和基因率的验证值A“”和共享密钥K“从函数值G(S”)。 “如果解密验证值a”是等于所述验证​​值的“” A比较单元127D输出共享密钥K。

    ENCRYPTION APPARATUS, DECRYPTION APPARATUS AND ENCRYPTION SYSTEM
    25.
    发明公开
    ENCRYPTION APPARATUS, DECRYPTION APPARATUS AND ENCRYPTION SYSTEM 审中-公开
    加密设备,解码设备和加密的系统

    公开(公告)号:EP1550258A1

    公开(公告)日:2005-07-06

    申请号:EP03748637.0

    申请日:2003-10-01

    IPC分类号: H04L9/30

    摘要: The present invention pertains to a transmission apparatus (110) for generating an encrypted text by encrypting a plaintext, which includes a parameter storage unit (112) 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; encryption unit (116) for generating, from the plaintext, the encrypted text using the encryption key and the random parameter stored in the parameter storage unit (112), complying with an encryption algorithm based on the NTRU method; and a key updating unit (118) for updating the random parameter stored in the parameter storage unit (112) and the encryption key, as time passes.

    Copyright protection system, recording device, and reproduction device
    29.
    发明公开
    Copyright protection system, recording device, and reproduction device 有权
    Urheberrechtschutzsystem,Aufzeichungsvorrichtung,und Wiedergabevorrichtung

    公开(公告)号:EP1288942A1

    公开(公告)日:2003-03-05

    申请号:EP02017657.4

    申请日:2002-08-06

    IPC分类号: G11B20/00 G06F1/00

    摘要: A copyright protection system (100) includes a recording device (10) and a reproduction device (30). The recording device (10) writes encrypted content (15), an encrypted content key (12,13) for decrypting the encrypted content (15), and license information (16) on a recording medium (20) on which a unique media number (21) has been recorded in an unrewritable state. The license information (16) is generated using both the media number (21) and the encrypted content key (13), and therefore reflects both values. The reproduction device (30) reads the media number (21), the encrypted content key (13,23), and the license information (16,22) from the recording medium (20), and judges (36) whether the license information (16,22) reflects both the media number (21) and the encrypted content key (13,23). Only if the license information (16,22) reflects both values, the reproduction device (30) decrypts the encrypted content key (32,33), and decrypts the encrypted content using the content key (12,13). In this way, the copyright protection system (100) allows only original recording media (20) to be reproduced, and prohibits reproduction of copy recording media.

    摘要翻译: 版权保护系统(100)包括记录装置(10)和再现装置(30)。 记录装置(10)将加密内容(15),用于解密加密内容(15)的加密内容密钥(12,13)和许可证信息(16)写入到其上具有唯一媒体号 (21)已被记录在不可回避的状态。 使用媒体号(21)和加密内容密钥(13)两者来生成许可信息(16),因此反映这两个值。 再现装置(30)从记录介质(20)读取媒体号(21),加密内容密钥(13,23)和许可信息(16,22),并且判断(36)许可信息 (16,22)反映媒体号(21)和加密的内容密钥(13,23)。 只有当许可证信息(16,22)反映了这两个值时,再现设备(30)对加密的内容密钥(32,33)进行解密,并且使用内容密钥对加密的内容进行解密(12,13)。 以这种方式,版权保护系统(100)仅允许再现原始记录介质(20),并且禁止复制记录介质的再现。