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    • 7. 发明公开
    • Asynchronous transfer mode integrated access service
    • 变电站Zugang zu ATM-Telekommunikationsdiensten
    • EP0844803A2
    • 1998-05-27
    • EP97308624.2
    • 1997-10-29
    • AT&T Corp.
    • Eakins, Richard CourtneyNewman, Cheryl F.Toth, Ronald W.Wu, Fang
    • H04Q11/04H04J3/06
    • H04L12/5602H04L2012/5615H04L2012/5632H04L2012/5672H04L2012/5673H04Q11/0478
    • A communications system is provided which supports asynchronous transfer mode (ATM) communications. An ATM multiplexer is located at a customer's premises and connected to customer premises voice and data equipment. A central office ATM multiplexer is connected to various different networks in the existing network infrastructure. The central office ATM multiplexer is preferably connected to networks such as a low-speed packet-switched network, a public circuit-switched network, a private line network, and a high-speed packet-switched network. The ATM multiplexer located at the customer premises preferably supports dynamic bandwidth allocation. Additional features provided by the communications system include the ability to provide different voice encoding schemes for different users based on calling party or called party information.
    • 提供支持异步传输模式(ATM)通信的通信系统。 ATM多路复用器位于客户场所,并连接到客户端的语音和数据设备。 中心局ATM多路复用器连接到现有网络基础设施中的各种不同网络。 中心局ATM多路复用器优选地连接到诸如低速分组交换网络,公共电路交换网络,专用线路网络和高速分组交换网络的网络。 位于客户驻地的ATM多路复用器优选地支持动态带宽分配。 由通信系统提供的附加特征包括基于主叫方或被叫方信息为不同用户提供不同语音编码方案的能力。
    • 9. 发明公开
    • Cryptographic data processing using cascade of cryptographic elements in feedback structure
    • Kryptografische Datenverarbeitung unter Verwendung einer Kaskadierung kryptografischer Elemente in einerRückkoppelung。
    • EP0673133A1
    • 1995-09-20
    • EP95200632.8
    • 1995-03-15
    • Koninklijke PTT Nederland N.V.
    • De Lange, Martin KlaasBoly, Jean Paul
    • H04L9/18
    • H04Q11/0478H04L9/065H04L2012/5673H04L2012/5687
    • The invention provides a device (1) for encrypting or decrypting data packets, comprising storage means (14) for temporarily storing data packets, identification means (15) for identifying data packets, processing means (11, 12, 13) for cryptographically processing data packets, and memory means (16) for storing cryptographic information. The processing means (11, 12, 13) comprise, according to the invention, a first (11) and a second (12) cryptographic element, the first cryptographic element (11) being designed for generating, on the basis of a first starting value, processing data for cryptographically processing a data packet, and the second cryptographic element (12) being designed for generating, on the basis of a second starting value, the first starting value. In addition, the processing means (11, 12, 13) according to the invention are designed for forming, on the basis of a cryptographically processed data packet, the second starting value, thereby ensuring the synchronization between corresponding encrypting and decrypting devices.
    • 本发明提供了一种用于加密或解密数据分组的装置(1),包括用于临时存储数据分组的存储装置(14),用于识别数据分组的识别装置(15),用于密码处理数据的处理装置(11,12,13) 分组,以及用于存储加密信息的存储装置(16)。 根据本发明,处理装置(11,12,13)包括第一密码元件(11)和第二密码元件(12),所述第一加密元件(11)被设计用于基于第一开始 值,处理用于密码处理数据分组的数据,以及被设计用于基于第二起始值生成第一起始值的第二密码元素(12)。 此外,根据本发明的处理装置(11,12,13)被设计用于基于密码处理的数据分组形成第二起始值,从而确保相应的加密和解密装置之间的同步。