Method and apparatus for encrypting/decrypting data
    1.
    发明授权
    Method and apparatus for encrypting/decrypting data 有权
    用于加密/解密数据的方法和装置

    公开(公告)号:US09276739B2

    公开(公告)日:2016-03-01

    申请号:US12305063

    申请日:2007-06-29

    IPC分类号: H04L9/08 H04L29/06 H04L9/00

    摘要: A method of encrypting data using a first key and multiple encryption keys at least in part based on the first key. The method includes encoding the data into a redundant representation by distributing the information content of the data among a number of groups, each group being associated with a respective encryption key of the multiple encryption keys, each encryption key being associated with at least one group, the redundant representation allowing recovery of the data in the absence of the groups associated with the at least one of the multiple encryption keys, and encrypting each group by the respective associated encryption key.

    摘要翻译: 至少部分地基于第一密钥使用第一密钥和多个加密密钥加密数据的方法。 该方法包括通过在多个组中分配数据的信息内容来将数据编码为冗余表示,每个组与多个加密密钥的相应加密密钥相关联,每个加密密钥与至少一个组相关联, 所述冗余表示允许在不存在与所述多个加密密钥中的所述至少一个加密密钥相关联的组的情况下恢复数据,以及通过各自相关联的加密密钥加密每个组。

    METHOD AND APPARATUS FOR ENCRYPTING/DECRYPTING DATA
    2.
    发明申请
    METHOD AND APPARATUS FOR ENCRYPTING/DECRYPTING DATA 有权
    加密/分解数据的方法和装置

    公开(公告)号:US20090208019A1

    公开(公告)日:2009-08-20

    申请号:US12305063

    申请日:2007-06-29

    摘要: The present invention relates to a method and apparatus for encrypting data (105) by means of a first key (115), and a method and apparatus for decrypting encrypted data by means of a second key (185). The present invention alleviates the need for exact key information by allowing encryption of data (105) by means of a first key (115) and subsequent decryption of the encrypted data by means of a second key (185) without the need for the first key (115), provided that the first key (115) and the second key (185) form a sufficient estimate of an encryption/decryption key pair. During encryption, multiple encryption keys (135), at least in part based on the first key (115), are used to encrypt a redundant representation (122) of the data (105). The encrypted data (124) may subsequently be decrypted by using multiple decryption keys (165) based on the second key (185), without the need for the first key (115), provided that the second key (185) forms a sufficient estimate of the first key (115).

    摘要翻译: 本发明涉及一种通过第一密钥(115)加密数据(105)的方法和装置,以及用于通过第二密钥(185)解密加密数据的方法和装置。 本发明通过允许借助于第一密钥(115)对数据(105)进行加密以及通过第二密钥(185)对加密数据的后续解密来减轻对精确密钥信息的需要,而不需要第一密钥 (115),条件是第一密钥(115)和第二密钥(185)形成加密/解密密钥对的充分估计。 在加密期间,至少部分地基于第一密钥(115)的多个加密密钥(135)被用于加密数据(105)的冗余表示(122)。 随后可以基于第二密钥(185)使用多个解密密钥(165)来解密加密数据(124),而不需要第一密钥(115),条件是第二密钥(185)形成足够的估计 的第一个键(115)。

    GENERATING STATISTICS OF POPULAR CONTENT
    3.
    发明申请
    GENERATING STATISTICS OF POPULAR CONTENT 有权
    产生广泛的内容统计

    公开(公告)号:US20110066723A1

    公开(公告)日:2011-03-17

    申请号:US12922580

    申请日:2009-03-18

    IPC分类号: G06F15/173

    CPC分类号: G06Q30/00

    摘要: Client terminals report an easy-to-calculate identifier such as the Internet URL or a cryptographic hash of the content to a server. The server collects and counts the reported identifiers so as to obtain preliminary statistics. By aggregating these reported identifiers into the preliminary statistics, identifiers are revealed that are likely popular content. The server selects one or more identifiers from the preliminary statistics and makes these available to at least a subset of clients. The clients that obtain these one or more identifiers then access content and compute the easy-to-calculate identifiers as usual. If the computed identifier matches one of the identifiers obtained from the server, the client will additionally extract a watermarked identifier or compute a digital fingerprint of the content in question and report this to the server. The server then uses the received identifier or fingerprint to create final statistics by aggregating the preliminary statistics.

    摘要翻译: 客户终端向服务器报告易于计算的标识符,例如Internet URL或内容的加密散列。 服务器收集并计算报告的标识符,以获取初步统计信息。 通过将这些报告的标识符聚合到初步统计信息中,显示可能是受欢迎的内容的标识符。 服务器从初步统计信息中选择一个或多个标识符,并使这些标识符可用于至少一个客户端子集。 获得这些一个或多个标识符的客户端然后访问内容并像往常一样计算易于计算的标识符。 如果计算出的标识符匹配从服务器获得的一个标识符,客户端将另外提取水印标识符或计算所讨论的内容的数字指纹,并将其报告给服务器。 然后,服务器使用接收到的标识符或指纹,通过汇总初步统计信息来创建最终统计信息。

    WATERMARK EMBEDDING USING LOOK-UP TABLES
    4.
    发明申请
    WATERMARK EMBEDDING USING LOOK-UP TABLES 审中-公开
    WATERMARK嵌入使用查看表

    公开(公告)号:US20090136026A1

    公开(公告)日:2009-05-28

    申请号:US12295650

    申请日:2007-03-29

    IPC分类号: H04L9/32 H04L9/00 G06F21/24

    摘要: The invention relates to embedding a spread spectrum watermark in a data signal as well as to detection of the embedded watermark. A data signal (4) is encrypted (15) or received in the form of an encrypted data signal (9), the signal being encrypted by modifying (3) it in accordance with one or more entries of a look-up-table (2) in which an encryption table (6) is stored. The encryption is carried out by a first computing device (15) such as a server device. The watermark is actually embedded while decrypting (13) the signal. This takes place in a second computing device (16), possibly in a client device, in a similar manner The client device employs a decryption table (8), which is a modified (i.e. watermarked) version of the encryption table (6). The decryption table may generated by the server and securely communicated to the client. The data signal is decrypted in accordance with entries of a look-up-table (12). The look-up-tables (2,12) in server and client are addressed by the same sequence of pointers generated by respective index generators (1). The mismatch between encryption table (6) and decryption table (8) causes the de-signal (14) to have an embedded watermark.

    摘要翻译: 本发明涉及在数据信号中嵌入扩频水印以及嵌入水印的检测。 数据信号(4)被加密(15)或以加密数据信号(9)的形式接收,该信号通过根据查找表的一个或多个条目修改(3) 2),其中存储加密表(6)。 加密由诸如服务器设备的第一计算设备(15)执行。 在解密(13)信号时实际嵌入水印。 这可以以类似的方式在可能在客户端设备中的第二计算设备(16)中进行。客户端设备使用作为加密表(6)的修改(即加水印)版本的解密表(8)。 解密表可以由服务器生成并且安全地传送给客户机。 数据信号根据查找表(12)的条目解密。 服务器和客户机中的查找表(2,12)由相应的索引生成器(1)生成的相同的指针序列进行寻址。 加密表(6)与解密表(8)之间的失配导致去信号(14)具有嵌入的水印。

    Remote Informed Watermark Detection System
    5.
    发明申请
    Remote Informed Watermark Detection System 审中-公开
    远程信息水印检测系统

    公开(公告)号:US20080250240A1

    公开(公告)日:2008-10-09

    申请号:US12089755

    申请日:2006-10-06

    IPC分类号: H04L9/00

    摘要: A system and a method for secure remote informed watermark detection making use of a side-information. The system in overview comprises a remote detector and a server computing system wherein a database with side-information assigned to specific descriptors of data signals is stored at the server computing system and wherein a remote detector intending to identify the watermark of a data signal will derive the descriptor of the data signal and subsequently contact the trusted server computing system in order to obtain the necessary side-information for the informed watermark detection.

    摘要翻译: 一种使用侧信息的安全远程通知水印检测的系统和方法。 该系统概述包括远程检测器和服务器计算系统,其中具有分配给数据信号的特定描述符的侧信息的数据库被存储在服务器计算系统中,并且其中将导出旨在识别数据信号的水印的远程检测器 数据信号的描述符,并随后与受信任的服务器计算系统联系,以便获得通知水印检测所需的侧信息。

    Perpetual Masking For Secure Watermark Embedding
    6.
    发明申请
    Perpetual Masking For Secure Watermark Embedding 审中-公开
    永久屏蔽安全水印嵌入

    公开(公告)号:US20080240435A1

    公开(公告)日:2008-10-02

    申请号:US12093690

    申请日:2006-11-06

    IPC分类号: H04L9/00

    摘要: Disclosed are a method and a system for secure watermark embedding in a server-client configuration (60,70). The method comprises encrypting (210) the data signal (x) and generating (240) a decryption key wherein a watermark (Wi) is included. The client decrypts (420) the encrypted data signal in order to obtain a watermarked data signal (xw). In accordance with the invention, the encryption mechanism and decryption key are made dependent on a perceptual mask (m1,m2) so as eventually make the embedded watermark more robust.

    摘要翻译: 公开了一种用于在服务器 - 客户端配置中嵌入安全水印的方法和系统(60,70)。 该方法包括加密(210)数据信号(x)并产生(240)解密密钥,其中包括水印(W SUB)。 客户端解密(420)加密的数据信号,以便获得加水印的数据信号(x )。 根据本发明,加密机制和解密密钥取决于感知掩码(m 1,m 2),以便最终使嵌入的水印更加鲁棒。

    RENDERING DEVICE WITH CONTENT SUBSTITUTION
    8.
    发明申请
    RENDERING DEVICE WITH CONTENT SUBSTITUTION 审中-公开
    具有内容替换的渲染设备

    公开(公告)号:US20140196071A1

    公开(公告)日:2014-07-10

    申请号:US14127432

    申请日:2012-06-20

    摘要: A device for rendering content from a first source comprising a first input for receiving the content from the first source, a second input for receiving a substitution content item from a second source, a substitution module for substituting a segment of the content with the substitution content item, and rendering means for rendering the content wherein the segment is substituted with the substitution content item. The rendering device has monitoring module for monitoring the reception of the segment, and controlling the substitution module dependent on whether the segment is being received, such that the substitution module ceases the substitution upon failure to receive the segment.

    摘要翻译: 一种用于从第一源渲染内容的装置,包括用于从第一源接收内容的第一输入,用于从第二源接收替换内容项的第二输入,用替换内容替换内容段 项目和呈现装置,用于呈现其中所述片段被替换内容项目代替的内容。 呈现装置具有用于监视段的接收的监视模块,并且依赖于是否正在接收段来控制替换模块,使得替换模块在接收到段失败时停止替换。

    WARERMARKING AND ENCRYPTION OF ENTROPY-CODED DATA USING ADDITIVE HUFFMAN TABLE
    9.
    发明申请
    WARERMARKING AND ENCRYPTION OF ENTROPY-CODED DATA USING ADDITIVE HUFFMAN TABLE 审中-公开
    使用添加剂HUFFMAN表加密和加密熵编码数据

    公开(公告)号:US20100177888A1

    公开(公告)日:2010-07-15

    申请号:US12667247

    申请日:2008-07-01

    IPC分类号: H04L9/28 H03M7/00

    摘要: A secure forensic watermarking system is disclosed that distributes the same encrypted content to all users. The decryption key is different for each user, so that the decrypted content differs slightly from the original, i.e. is watermarked. Forensic tracking is possible by distributing unique decryption keys to individual users. The invention allows a forensic mark to be securely embedded in the compressed domain signal. In an embodiment of this invention, the content (x) and an encryption sequence (r) are entropy encoded using a homomorphic Huffman table. A homomorphic Huffmann table is a table H having the property that there exists an operation f( ) such that H-1 (f(H(a),H(b)))=a+b.

    摘要翻译: 公开了一种安全的法医水印系统,其将相同的加密内容分发给所有用户。 解密密钥对于每个用户是不同的,使得解密的内容与原始内容略有不同,即被加密。 通过向个别用户分发唯一的解密密钥可以进行取证跟踪。 本发明允许将法医标记安全地嵌入到压缩域信号中。 在本发明的一个实施例中,内容(x)和加密序列(r)使用同态霍夫曼表进行熵编码。 同形霍夫曼表是具有存在使得H-1(f(H(a),H(b)))= a + b的操作f()的性质的表H。

    APPARATUS & METHODS FOR DIGITAL CONTENT DISTRIBUTION
    10.
    发明申请
    APPARATUS & METHODS FOR DIGITAL CONTENT DISTRIBUTION 审中-公开
    数字内容分发的装置和方法

    公开(公告)号:US20100082478A1

    公开(公告)日:2010-04-01

    申请号:US12530561

    申请日:2008-03-10

    IPC分类号: G06Q40/00 H04L9/08 H04L9/32

    摘要: The present invention relates to methods and apparatus for digital content distribution. A method of transferring digital content from a first entity (60) to a second entity (70) includes the steps of: a transfer control entity (50) transmitting a transmission key (KA) to the first entity, the first entity storing content data comprising digital content embedded with a first watermark (WA). The first entity applies the transmission key to the content data to remove the first watermark from the digital content and encrypt the digital content. The first entity transmits the encrypted digital content (CX) to the second entity. The transfer control entity transmits a receive key (KB) to the second entity and the second entity applies the receive key to the encrypted digital content to generate decrypted data comprising the decrypted digital content embedded with a second watermark (WB).

    摘要翻译: 本发明涉及数字内容分发的方法和装置。 将数字内容从第一实体(60)传送到第二实体(70)的方法包括以下步骤:传送控制实体(50)向第一实体发送传输密钥(KA),第一实体存储内容数据 包括嵌入第一水印(WA)的数字内容。 第一实体将传输密钥应用于内容数据,以从数字内容中移除第一水印并加密数字内容。 第一实体将加密的数字内容(CX)发送到第二实体。 转移控制实体向第二实体发送接收密钥(KB),第二实体将接收密钥应用于加密的数字内容,以生成包含用第二水印(WB)嵌入的解密的数字内容的解密数据。