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    • 9. 发明申请
    • REDUCING SECURITY PROTOCOL OVERHEAD IN LOW DATA RATE APPLICATIONS OVER A WIRELESS LINK
    • 通过无线链路在低数据速率应用中减少安全协议开销
    • WO2008020279A2
    • 2008-02-21
    • PCT/IB2007/002133
    • 2007-07-27
    • NOKIA CORPORATIONNOKIA, INC.EKBERG, Jan-ErikLAPPETELÄINEN, Antti
    • EKBERG, Jan-ErikLAPPETELÄINEN, Antti
    • H04L9/00
    • H04L9/065H04L63/162H04L2209/08H04L2209/80H04W12/02
    • A wireless communication module to provide security at a baseband layer is disclosed. A payload of plaintext may be divided into partitions. The module may use a block cipher such as the Advanced Encryption Standard (AES) algorithm to process a unique initiation vector (IV) for each partition so that each partition may be XORed with a key stream based on a respective IV, the result providing ciphertext. The IV may include a nonce, an upper level packet counter, a packet counter and a block counter. The state of the counters may be incremented in a predetermined pattern so as to provide a unique IV for use with each partition. The ciphertext may be transmitted in a packet with a security bit indicating that the payload is encrypted but omitting the nonce. Encrypted packets may include an integrity check value (ICV) to provide for integrity of the encrypted message.
    • 公开了一种在基带层提供安全性的无线通信模块。 明文的有效载荷可以分成多个分区。 模块可以使用诸如高级加密标准(AES)算法之类的分组密码来处理每个分区的唯一初始向量(IV),使得每个分区可以基于各自的IV与密钥流进行XOR,结果提供密文 。 IV可以包括随机数,上级分组计数器,分组计数器和块计数器。 计数器的状态可以以预定模式增加,以提供用于每个分区的独特的IV。 密文可以在具有安全位的分组中传输,该安全位指示有效载荷被加密但省略了随机数。 加密的数据包可能包含完整性检查值(ICV),以提供加密的消息的完整性。