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    • 2. 发明授权
    • Cryptographic authentication of transmitted messages using pseudorandom
numbers
    • 使用伪随机数的传输消息的加密认证
    • US5377270A
    • 1994-12-27
    • US85423
    • 1993-06-30
    • Philip J. Koopman, Jr.Alan M. Finn
    • Philip J. Koopman, Jr.Alan M. Finn
    • E05B49/00E05B65/20G09C1/00H04L9/12H04L9/20H04L9/32H04L9/00
    • H04L9/3271H04L9/12H04L2209/04H04L2209/12H04L2209/20H04L2209/84
    • An automobile door lock receiver module (30) and a plurality of keychain fob transmitter units (16) contain identification numbers, secret initial values, and secret feedback masks so as to authenticate encrypted messages from any of the assigned fobs, indicative of commands registered by closing switches on the fob. Each fob is synchronized with the receiving module by means of a truly random number concatenated with a secret initial value and encrypted, through a linear feedback shift register or other operations. A second secret initial value is encrypted and command bits are exclusive ORed into the low order bit positions; the two encrypted numbers are concatenated and encrypted to form a key word which is transmitted with the fob ID. Synchronization includes decrypting to recover the truly random number and the secret initial value concatenated therewith; the truly random number is compared with previously received random numbers in order to avoid copying of recently transmitted synchronization commands. Successive lock-related commands utilize the number encrypted from the truly random number and the second secret initial value as starting values, employing a pseudorandom number of encryption iterations. A half-second delay between responses mitigates gaining access through numerical trials. An authenticated panic alarm command operates the headlights and horn of the vehicle but does not alter the synchronization.
    • 汽车门锁接收器模块(30)和多个钥匙扣抽头发射器单元(16)包含识别号码,秘密初始值和秘密反馈掩码,以便从任何分配的信息点识别加密的消息,指示由 关闭开关。 每个FOB通过与秘密初始值连接并通过线性反馈移位寄存器或其他操作进行加密的真正随机数与接收模块同步。 第二秘密初始值被加密,并且命令位被异或进入低位位置; 两个加密号码被连接并加密,以形成一个用小号码ID发送的关键字。 同步包括解密以恢复与其连接的真实随机数和秘密初始值; 将真正的随机数与先前接收到的随机数进行比较,以避免最近发送的同步命令的复制。 连续锁相关命令利用从真正随机数加密的号码和第二秘密初始值作为起始值,采用伪随机数加密迭代。 响应之间的半秒延迟缓解了通过数值试验获得访问。 经认证的紧急报警指令用于操作车辆的前灯和喇叭,但不会改变同步。
    • 3. 再颁专利
    • Pseudorandom number generation and crytographic authentication
    • 伪随机数生成和加密认证
    • USRE36181E
    • 1999-04-06
    • US751932
    • 1996-11-08
    • Philip J. Koopman, Jr.Alan M. Finn
    • Philip J. Koopman, Jr.Alan M. Finn
    • E05B49/00E05B65/20G06F7/58G07C9/00G09C1/00H04L9/20H04L9/32
    • G06F7/584G07C9/00182H04L9/12H04L9/304H04L9/32G06F2207/583G07C2009/00253G07C2009/00769G07C2009/00825G07C2009/00984G07C2209/06H04L2209/04H04L2209/08H04L2209/12H04L2209/20H04L2209/84
    • An automobile door lock receiver module (30) and a plurality of keychain fob transmitter units (16) contain identification numbers, secret initial values, and secret feedback masks so as to authenticate encrypted messages from any of the assigned fobs, indicative of commands registered by closing switches on the fob. Each fob is synchronized with the receiving module by means of a truly random number concatenated with a secret initial value and encrypted, through a linear feedback shift register or other operations. A second secret initial value is encrypted and command bits are exclusive ORed into the low order bit positions; the two encrypted numbers are concatenated and encrypted to form a key word which is transmitted with the fob ID. Synchronization includes decrypting to recover the truly random number and the secret initial value concatenated therewith; the truly random number is compared with previously received random numbers in order to avoid copying of recently transmitted synchronization commands. Successive lock-related commands utilize the number encrypted from the truly random number and the second secret initial value as starting values, employing a pseudorandom number of encryption iterations. A half-second delay between responses mitigates gaining access through numerical trials. An authenticated panic alarm command operates the headlights and horn of the vehicle but does not alter the synchronization.
    • 汽车门锁接收器模块(30)和多个钥匙扣抽头发射器单元(16)包含识别号码,秘密初始值和秘密反馈掩码,以便从任何分配的信息点识别加密的消息,指示由 关闭开关。 每个FOB通过与秘密初始值连接并通过线性反馈移位寄存器或其他操作进行加密的真正随机数与接收模块同步。 第二秘密初始值被加密,并且命令位被异或进入低位位置; 两个加密号码被连接并加密,以形成一个用小号码ID发送的关键字。 同步包括解密以恢复与其连接的真实随机数和秘密初始值; 将真正的随机数与先前接收到的随机数进行比较,以避免最近发送的同步命令的复制。 连续锁相关命令利用从真正随机数加密的号码和第二秘密初始值作为起始值,采用伪随机数加密迭代。 响应之间的半秒延迟缓解了通过数值试验获得访问。 经认证的紧急报警指令用于操作车辆的前灯和喇叭,但不会改变同步。
    • 8. 发明授权
    • Pseudorandom number generation and cryptographic authentication
    • 伪随机数生成和加密认证
    • US5363448A
    • 1994-11-08
    • US86080
    • 1993-06-30
    • Philip J. Koopman, Jr.Alan M. Finn
    • Philip J. Koopman, Jr.Alan M. Finn
    • E05B49/00E05B65/20G06F7/58G07C9/00G09C1/00H04L9/20H04L9/32
    • G06F7/584G07C9/00182H04L9/12H04L9/304H04L9/32G06F2207/583G07C2009/00253G07C2009/00769G07C2009/00825G07C2009/00984G07C2209/06H04L2209/04H04L2209/08H04L2209/12H04L2209/20H04L2209/84
    • An automobile door lock receiver module (30) and a plurality of keychain fob transmitter units (16) contain identification numbers, secret initial values, and secret feedback masks so as to authenticate encrypted messages from any of the assigned fobs, indicative of commands registered by closing switches on the fob. Each fob is synchronized with the receiving module by means of a truly random number concatenated with a secret initial value and encrypted, through a linear feedback shift register or other operations. A second secret initial value is encrypted and command bits are exclusive ORed into the low order bit positions; the two encrypted numbers are concatenated and encrypted to form a key word which is transmitted with the fob ID. Synchronization includes decrypting to recover the truly random number and the secret initial value concatenated therewith; the truly random number is compared with previously received random numbers in order to avoid copying of recently transmitted synchronization commands. Successive lock-related commands utilize the number encrypted from the truly random number and the second secret initial value as starting values, employing a pseudorandom number of encryption iterations. A half-second delay between responses mitigates gaining access through numerical trials. An authenticated panic alarm command operates the headlights and horn of the vehicle but does not alter the synchronization.
    • 汽车门锁接收器模块(30)和多个钥匙扣抽头发射器单元(16)包含识别号码,秘密初始值和秘密反馈掩码,以便从任何分配的信息点识别加密的消息,指示由 关闭开关。 每个FOB通过与秘密初始值连接并通过线性反馈移位寄存器或其他操作进行加密的真正随机数与接收模块同步。 第二秘密初始值被加密,并且命令位被异或进入低位位置; 两个加密号码被连接并加密,以形成一个用小号码ID发送的关键字。 同步包括解密以恢复与其连接的真实随机数和秘密初始值; 将真正的随机数与先前接收到的随机数进行比较,以避免最近发送的同步命令的复制。 连续锁相关命令利用从真正随机数加密的号码和第二秘密初始值作为起始值,采用伪随机数加密迭代。 响应之间的半秒延迟缓解了通过数值试验获得访问。 经认证的紧急报警指令用于操作车辆的前灯和喇叭,但不会改变同步。
    • 9. 再颁专利
    • Cryptographic authentication of transmitted messages using pseudorandom
numbers
    • 使用伪随机数的传输消息的加密认证
    • USRE36752E
    • 2000-06-27
    • US771526
    • 1996-12-23
    • Philip J. Koopman, Jr.Alan M. Finn
    • Philip J. Koopman, Jr.Alan M. Finn
    • E05B49/00E05B65/20G09C1/00H04L9/12H04L9/20H04L9/32H04L9/00
    • H04L9/3271H04L9/12H04L2209/04H04L2209/12H04L2209/20H04L2209/84
    • An automobile door receiver module (30) and a plurality of keychain fob transmitter units (16) contain identification numbers, secret initial values, and secret feedback masks so as to authenticate encrypted messages from any of the assigned fobs, indicative of commands registered by closing switches on the fob. Each fob is synchronized with the receiving module by means of a truly random number concatenated with a secret initial value and encrypted, through a linear feedback shift register or other operations. A second secret initial value is encrypted and command bits are exclusive ORed into the low order bit positions; the two encrypted numbers are concatenated and encrypted to form a key word which is transmitted with the fob ID. Synchronization includes decrypting to recover the truly random number and the secret initial value concatenated therewith; the truly random number is compared with previously received random numbers in order to avoid copying of recently transmitted synchronization commands. Successive lock-related commands utilize the number encrypted from the truly random number and the second secret initial value as starting values, employing a pseudorandom number of encryption iterations. A half-second delay between responses mitigates gaining access through numerical trials. An authenticated panic alarm command operates the headlights and horn of the vehicle but does not alter the synchronization.
    • 汽车门接收器模块(30)和多个钥匙扣抽头发射器单元(16)包含识别号码,秘密初始值和秘密反馈掩码,以便从任何分配的信息点识别加密的消息,指示通过关闭登记的命令 切换到FOB。 每个FOB通过与秘密初始值连接并通过线性反馈移位寄存器或其他操作进行加密的真正随机数与接收模块同步。 第二秘密初始值被加密,并且命令位被异或进入低位位置; 两个加密号码被连接并加密,以形成一个用小号码ID发送的关键字。 同步包括解密以恢复与其连接的真实随机数和秘密初始值; 将真正的随机数与先前接收到的随机数进行比较,以避免最近发送的同步命令的复制。 连续锁相关命令利用从真正随机数加密的号码和第二秘密初始值作为起始值,采用伪随机数加密迭代。 响应之间的半秒延迟缓解了通过数值试验获得访问。 经认证的紧急报警指令用于操作车辆的前灯和喇叭,但不会改变同步。