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22 条记录 (耗时 0.012 秒)

    ROBUST WATERMARK
    5.
    发明公开
    ROBUST WATERMARK 有权
    坚固的WATERMARK

    公开(公告)号：EP2441262A1

    公开(公告)日：2012-04-18

    申请号：EP09804147.8

    申请日：2009-12-16

    申请人： NDS Limited

    发明人： MANTIN, Itsik ,  KIPNIS, Aviad

    IPC分类号： H04N7/24 ,  H04N7/167

    CPC分类号： H04N21/64715 ,  G06T1/0021 ,  G06T1/005 ,  G06T2201/0061 ,  H04N7/1675 ,  H04N21/23892 ,  H04N21/8355 ,  H04N21/8358

    摘要： A method and system for embedding a watermark in block encrypted content, including encoding a bit string, the bit string including n bits, denoted b
    0 - b
    n-1 , the encoding including translating each bit, b
    0 - b
    n-1 , into a block of data, according to the following rule if b
    i = 1, then translate b
    i into a block of data of a first type, and if b
    i = 0, then translate b
    i into a block of data of a second type, thereby translating the n bits into n blocks of data corresponding to each bit b
    0 - b
    n-1 , arranging a composite block of data including the n blocks of data, and at least one additional block indicating the presence of the n blocks of data, and inserting the composite block of data into a content item as a watermark, wherein the watermarked content item is encrypted using an ECB mode of encryption. Related methods and apparatus are also described.

    SECURITY WITHIN INTEGRATED CIRCUITS
    6.
    发明公开
    SECURITY WITHIN INTEGRATED CIRCUITS 有权
    安全集成电路

    公开(公告)号：EP2300954A2

    公开(公告)日：2011-03-30

    申请号：EP09769691.8

    申请日：2009-05-21

    申请人： NDS Limited

    发明人： SHEN-ORR, Chaim ,  SHKEDY, Zvi ,  ELBAUM, Reuven ,  SHLOMOVICH, Yonatan ,  SHAPIRO, Yigal ,  BELENKY, Yaacov ,  LEVY, Yaakov (Jordan) ,  SUMNER, Reuben ,  MANTIN, Itsik

    IPC分类号： G06F21/00 ,  G06F21/02

    CPC分类号： G06F21/60 ,  G06F21/79 ,  H04L9/003

    摘要： A method for hindering detection of information unintentionally leaked from a secret held in a memory unit is described, the method including receiving a triggering event waiting for at least a first amount of time to pass after the receipt of the triggering event, the memory unit being in a non-operational state during the at least a first amount of time, after the at least a first amount of time has passed, changing at least one first condition under which the memory unit operates, thereby causing the memory unit to enter an operational state, waiting for a second amount of time to pass after the changing at least one first condition, and changing, after the second amount of time, at least one second condition under which the memory unit operates, thereby causing the memory unit to enter the non-operational state, wherein access to the secret information is enabled only during the second amount of time, and detection of secret information unintentionally leaked is limited during the first amount of time. Related apparatus and methods are also described.

    ROBUST CIPHER DESIGN
    9.
    发明公开
    ROBUST CIPHER DESIGN 有权
    稳健密码设计

    公开(公告)号：EP2016524A2

    公开(公告)日：2009-01-21

    申请号：EP07713382.5

    申请日：2007-03-20

    申请人： NDS LIMITED

    发明人： MANTIN, Itsik ,  GRABOVSKY, Aharon

    IPC分类号： G06F21/24

    CPC分类号： H04L9/0618 ,  H04L2209/24

    摘要： In an iterated block cipher, a method for round key encryption and key generation, the method including providing a first function Fi and a second function Fj, providing a round key generation function, the round key generation function being operative to utilize, in any given round, exactly one of the first function Fi, and the second function Fj, providing a round mixing function, the round mixing function being operative to utilize, in any given round, exactly one of the first function Fi, and the second function Fj, utilizing the round key generation function in at least a first round to generate a second round key for use in a second round, and utilizing the round mixing function in at least the first round to mix a first round key with a cipher state, wherein one of the following is performed in the first round the round key generation function utilizes the first function Fi to generate the second round key for use in the second round, substantially simultaneously with the round key mixing function utilizing the second function Fj to mix the first round key with the cipher state, and the round key generation function utilizes the second function Fj to generate the second round key for use in the second round, substantially simultaneously with the round key mixing function utilizing the first function Fi to mix the first round key with the cipher state. Related apparatus and methods are also described.

    PASSWORD PROTECTION
    10.
    发明公开
    PASSWORD PROTECTION 有权
    密码保护

    公开(公告)号：EP1999885A1

    公开(公告)日：2008-12-10

    申请号：EP06796146.6

    申请日：2006-10-03

    申请人： NDS LIMITED

    发明人： MANTIN, Itsik

    IPC分类号： H04L9/32

    CPC分类号： H04L9/3226 ,  G06F21/31 ,  H04L9/3236 ,  H04L2209/30 ,  H04L2209/805

    摘要： An authentication system, including a pattern module to provide a pattern, a function module to provide a one-way function having a plurality of input and output values, a function processor to find one of the input values for the one-way function such that a corresponding one of the output values has the pattern, a password module to provide the one input value as a password for use in password authentication against the one output value, the one output value being a check value having a length, a compression module to determine a storage value such that: the check value can be reconstructed from the storage value and the pattern, and the storage value has a length which is shorter than the length of the check value, and a storage module to store the storage value in a storage medium for later retrieval. Related apparatus and methods are also included.