Method and apparatus for broadcast services in a communication system
    3.
    发明授权
    Method and apparatus for broadcast services in a communication system 有权
    通信系统中广播服务的方法和装置

    公开(公告)号:US07599655B2

    公开(公告)日:2009-10-06

    申请号:US10335626

    申请日:2003-01-02

    IPC分类号: H04H1/00

    摘要: A method, apparatus and system provide for efficient use of communication resources for providing broadcast services in a communication system. A receiver receives a first broadcast controller identification from a first base station, and a second broadcast controller identification from a second base station. A controller coupled to the receiver determines whether the first and second broadcast controller identifications are associated with use of a common set of broadcast parameters. A transmitter transmits a request for transmission of a new set of broadcast parameters when the first and second broadcast controller identifications are not associated with use of the common set of broadcast parameters. After receiving the new set of broadcast parameters, the receiver uses the new set of broadcast parameters for receiving broadcast services.

    摘要翻译: 方法,装置和系统提供用于在通信系统中提供广播服务的通信资源的有效利用。 接收机从第一基站接收第一广播控制器标识和从第二基站接收第二广播控制器标识。 耦合到接收器的控制器确定第一和第二广播控制器标识是否与使用一组公共广播参数相关联。 当第一和第二广播控制器标识与广播参数的公共集合的使用不相关时,发射机发送用于传输新的一组广播参数的请求。 在接收到新的广播参数集之后,接收机使用新的广播参数集合来接收广播服务。

    Cryptosync design for a wireless communication system
    4.
    发明授权
    Cryptosync design for a wireless communication system 有权
    无线通信系统的密码同步设计

    公开(公告)号:US08218768B2

    公开(公告)日:2012-07-10

    申请号:US10106971

    申请日:2002-03-25

    IPC分类号: H04L29/06

    摘要: A cryptosync design comprising (1) a channel identifier indicative of a particular channel via which a data packet is sent, (2) an extended time stamp indicative of a time value associated with the data packet, and (3) a counter indicative of a packet count associated with the data packet. The lengths of the extended time stamp and counter fields and the time unit for the extended time stamp are parameters that may be configured for each channel. At the sender, the extended time stamp for the cryptosync may be obtained from the System Time maintained by the sender. The counter value for the cryptosync may be provided by a counter that is maintained for the channel by the sender. The sender may include a time stamp and/or the counter value, if they are needed to derive the cryptosync at the receiver, in a header of the data packet.

    摘要翻译: 密码同步设计,包括(1)指示发送数据分组的特定信道的信道标识符,(2)指示与数据分组相关联的时间值的扩展时间戳,以及(3)指示 与数据包相关联的数据包计数。 扩展时间戳和计数器字段的长度以及扩展时间戳的时间单位是可以为每个通道配置的参数。 在发送方,密码同步的扩展时间戳可以从发送方维护的系统时间获取。 密码同步的计数器值可以由发送者为该信道维护的计数器提供。 如果在数据分组的报头中需要在接收机处导出密码同步,则发送者可以包括时间戳和/或计数器值。

    Method and apparatus for preferred roaming list compression
    5.
    发明授权
    Method and apparatus for preferred roaming list compression 有权
    优选漫游列表压缩的方法和装置

    公开(公告)号:US08209332B2

    公开(公告)日:2012-06-26

    申请号:US11586030

    申请日:2006-10-24

    IPC分类号: G06F17/30

    摘要: Techniques for efficient storage and retrieval of Preferred Roaming Lists are disclosed. In one aspect, PRL entries are stored in two tables. One table contains records that are common to two or more PRL entries. Another table stores any information that is unique to a PRL entry, as well as an indicator of which common record is associated with it. The common record is concatenated with the unique information to generate the uncompressed PRL entry. Various other aspects of the invention are also presented. These aspects have the benefit of reducing the memory requirements for storing a PRL. In addition, time required to download the compressed PRL is reduced.

    摘要翻译: 公开了用于有效地存储和检索优选漫游列表的技术。 在一个方面,PRL条目存储在两个表中。 一个表包含两个或多个PRL条目通用的记录。 另一个表存储PRL条目唯一的任何信息,以及与其相关联的常见记录的指示符。 公共记录与唯一信息连接以生成未压缩的PRL条目。 还提出了本发明的各种其它方面。 这些方面有利于减少存储PRL的内存需求。 此外,减少了压缩PRL下载所需的时间。

    Method and system for managing authentication and payment for use of broadcast material
    8.
    发明授权
    Method and system for managing authentication and payment for use of broadcast material 有权
    用于管理广播资料使用认证和付款的方法和系统

    公开(公告)号:US07966662B2

    公开(公告)日:2011-06-21

    申请号:US11031507

    申请日:2005-01-06

    IPC分类号: H04L9/32

    摘要: An authentication system is disclosed. The authentication system includes a content provider configured to distribute encrypted content, wherein the encrypted content is generated using a content key, and a client having a symmetric key and configured to store the encrypted content received from the content provider and issue a request to the content provider, wherein the request includes a cryptographic function configured to have the symmetric key and the encrypted content as input, wherein the content provider is further configured to verify the client via the request to ensure that the client has received the encrypted content.

    摘要翻译: 公开了一种认证系统。 该认证系统包括内容提供器,其被配置为分发加密的内容,其中使用内容密钥生成加密的内容,以及具有对称密钥的客户端,并且被配置为存储从内容提供者接收的加密内容并向内容发出请求 提供者,其中所述请求包括被配置为具有所述对称密钥和所述加密内容作为输入的加密功能,其中所述内容提供商还被配置为经由所述请求来验证所述客户端以确保所述客户端已经接收到所述加密的内容。

    Limiting delays associated with the generation of encryption stream ciphers
    9.
    发明授权
    Limiting delays associated with the generation of encryption stream ciphers 有权
    限制与生成加密流密码相关的延迟

    公开(公告)号:US06560338B1

    公开(公告)日:2003-05-06

    申请号:US09246366

    申请日:1999-02-08

    IPC分类号: H04L922

    摘要: A method and an apparatus for generating encryption stream ciphers are based on a recurrence relation designed to operate over finite fields larger than GF(2). A non-linear output can be obtained by using one or a combination of non-linear processes to form an output function. The recurrence relation and the output function can be selected to have distinct pair distances such that, as the shift register is shifted, no identical pair of elements of the shift register are used twice in either the recurrence relation or the output function. Under these conditions, the recurrence relation and the output function also can be chosen to optimize cryptographic security or computational efficiency. Moreover, it is another object of the present invention to provide a method of assuring that the delay that results for the encryption process does not exceed predetermined bounds. To this end the ciphering delay is measured and if the estimated delay exceeds a predetermined threshold a second ciphering method is employed to limit the accumulated delay of the ciphering operation.

    摘要翻译: 用于产生加密流密码的方法和装置基于设计成在大于GF(2)的有限域上操作的递归关系。 可以通过使用非线性处理中的一个或组合来形成非线性输出来形成输出函数。 递归关系和输出函数可以被选择为具有不同的对距离,使得当移位寄存器被移位时,移位寄存器的相同元素对在递归关系或输出函数中不被使用两次。 在这些条件下,可以选择递归关系和输出函数来优化加密安全性或计算效率。 此外,本发明的另一个目的是提供一种确保加密过程导致的延迟不超过预定范围的方法。 为此,测量加密延迟,并且如果估计延迟超过预定阈值,则采用第二加密方法来限制加密操作的累积延迟。

    Generation of keyed integer permutations for message authentication codes
    10.
    发明授权
    Generation of keyed integer permutations for message authentication codes 失效
    生成用于消息认证码的密钥整数排列

    公开(公告)号:US07428305B1

    公开(公告)日:2008-09-23

    申请号:US09563648

    申请日:2000-05-02

    IPC分类号: H04L9/28 H04K1/00

    摘要: A method for constructing keyed integer permutations over the set ZN. where N can be factored into p and q, or N can be prime. N bits are permuted by deriving a keyed permutation of representative indices. When N is factorable into p and q, the set of indices are divided into two portions. The portions undergo iterative processing called “rounds,” and in each round, a first half-round function operates on the first portion to form a first half-round value; the first half-round value and the second portion are added together by a modulo-p adder to form a first output value; a second half-round function operates on the second portion to form a second half-round value; and the second half-round value and the first portion are added together by a modulo-q adder to form a second output value. In this manner, outputs of the rounds are reordered.If N is prime and not less than 13, then N is separated into composite values s and t, and two sets are formed with s and t elements, respectively. Each set is then permuted using the method for when N is not prime. At the end of each round, the two blocks are combined using a mixing operation.

    摘要翻译: 一种用于在集合Z N N上构造键控整数排列的方法。 其中N可以被分解成p和q,或者N可以是素数。 通过导出代表性索引的密钥排列来排列N位。 当N因素分解为p和q时,该组索引被分成两部分。 这些部分进行称为“轮”的迭代处理,并且在每一轮中,第一半圆函数在第一部分上操作以形成第一半圆值; 第一半值和第二部分通过模p加法器相加在一起以形成第一输出值; 第二半圆函数在第二部分上操作以形成第二半圆值; 并且第二半值和第一部分由模q加法器相加在一起以形成第二输出值。 以这种方式,循环的输出被重新排序。 如果N是素数并且不小于13,则N被分离成复合值s和t,并且两个组分别由s和t个元素形成。 然后使用N不为素数时的方法将每个集合置换。 在每轮结束时,使用混合操作组合两个块。