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2. 发明授权

US5608800A Process for detecting unauthorized introduction of any data transmitted by a transmitter to a receiver 失效
标题翻译：用于检测将发射机发送到接收机的任何数据未经授权的引入的过程
公开(公告)号：US5608800A
公开(公告)日：1997-03-04
申请号：US318700
申请日：1994-10-11
申请人： Gerhard Hoffmann , Klaus Lukas , Stephan Lechner , Ferdinand Steiner , Helmut Baumgartner , Ekkehard Lohmann , Matthias Leclerc
发明人： Gerhard Hoffmann , Klaus Lukas , Stephan Lechner , Ferdinand Steiner , Helmut Baumgartner , Ekkehard Lohmann , Matthias Leclerc
IPC分类号： H04L9/32 , H04L9/08 , H04K1/00 , H04L9/14
CPC分类号： H04L9/3247 , H04L2209/34
摘要： The process is intended to establish whether the data transmitted by the transmitter (SE) to the receiver (EM) have been tapped and spuriously reintroduced at a later point in time and/or have been inadmissibly altered. For this purpose, the signature (S) assigned to the useful data (D) is enciphered symmetrically, using a combination of coupling data (K), characterizing the coupling between transmitter and receiver, and random data (Z), generated by a random generator. The coupling data are transmitted in plain text, the random data are enciphered. On the receiver side it can be established whether the transmitted message has been tapped and reintroduced at a later point in time if the coupling data are inadmissible. An alteration of the transmitted message can be established from ascertaining that the key used for enciphering the signature, obtained from the combination of coupling data and random data with the aid of a one-way function, does not correspond to the key obtained during deciphering at the receiver and consequently the deciphering of the enciphered signature leads to an incorrect result. The incorrect signature is detected during verification of the signature.
摘要翻译： PCT No.PCT / DE93 / 00246 Sec。 371日期：1994年10月11日 102（e）日期1994年10月11日PCT 1993年3月17日PCT公布。出版物WO93 / 21711 日期1993年10月28日该过程旨在确定发射机（SE）向接收机（EM）发送的数据是否已经被轻敲并在稍后的时间点被虚假地重新引入和/或被不允许地改变。为此，分配给有用数据（D）的签名（S）对称地使用表征发送器和接收器之间的耦合的耦合数据（K）和随机数据（Z）的组合被加密，由随机数发电机。耦合数据以明文形式发送，随机数据被加密。在接收机侧，如果耦合数据不可接受，则可以建立传送的消息是否已经在随后的时间点被轻敲并重新引入。可以从确定用于通过单向功能的耦合数据和随机数据的组合获得的用于加密签名的密钥的确定不对应于在解密期间获得的密钥而被发送的消息的改变接收器和因此的加密签名的解密导致不正确的结果。在验证签名期间检测到不正确的签名。

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