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    • 3. 发明授权
    • Method and apparatus for using client puzzles to protect against denial-of-service attacks
    • 使用客户端谜题来防止拒绝服务攻击的方法和装置
    • US06944663B2
    • 2005-09-13
    • US10091826
    • 2002-03-06
    • Christoph L. SchubaErik Guttman
    • Christoph L. SchubaErik Guttman
    • G06F13/30G06F15/16G06F15/173H04L29/06
    • H04L63/12H04L63/1458
    • One embodiment of the present invention provides a system that protects a server against denial-of-service attacks. During operation, the server receives a request for service from a client. Note that the client can be distinguished from other clients, for example, by its source IP address. In response to this request, the server sends a random number, y, and an identifier, id1, to the client, and allows the client to compute a preimage, x, such that y=h(x). Upon receiving an answer from the client including the preimage x and an identifier, id2, the server verifies that the identifier, id1, sent to the client matches the identifier, id2, received from the client. If the identifiers match, the server computes h(x), and compares h(x) against y. If h(x)=y, the server performs the requested service for the client. In this way, the server avoids computing h(x) until the server receives the answer with a matching identifier.
    • 本发明的一个实施例提供了一种保护服务器免受拒绝服务攻击的系统。 在操作期间,服务器从客户端接收服务请求。 请注意,客户端可以与其他客户端区分开来,例如,通过其源IP地址。 响应于该请求,服务器向客户端发送随机数y和标识符id 1,并且允许客户机计算预图像x,使得y = h( X)。 在从客户端接收到包括预图像x和标识符id 2的解答的情况下,服务器验证发送给客户端的标识符id 1是否符合标识符, id <2> ,从客户端收到。 如果标识符匹配,则服务器计算h(x),并将h(x)与y进行比较。 如果h(x)= y,则服务器为客户端执行所请求的服务。 以这种方式,服务器避免计算h(x),直到服务器接收到具有匹配标识符的答案。
    • 9. 发明申请
    • METHOD AND APPARATUS FOR QUALITY OF SERVICE CONTROL FOR A USER EQUIPMENT
    • 用于用户设备的服务质量控制的方法和装置
    • US20140115159A1
    • 2014-04-24
    • US14110014
    • 2012-03-29
    • Haris ZisimopoulosErik Guttman
    • Haris ZisimopoulosErik Guttman
    • H04L12/24
    • H04L41/50H04L41/0806H04L41/5025H04L41/5029H04L41/5051H04L41/5067H04M15/66H04M15/80H04M15/8016H04M15/8038H04W12/08H04W28/06H04W28/24H04W36/14
    • The present invention relates generally to communication systems, and more specifically, but not exclusively to a method and apparatus for quality of service control for a user equipment in a communication system comprising a home network with respect to the user equipment and a visited network. In accordance with a first aspect of the present invention, there is provided a method of quality of service control for a user equipment in a communication system comprising a first network and a second network, the first network being a home network with respect to said user equipment and the second network being a visited network with respect to said user equipment, the method comprising: receiving authorisation information at said user equipment from the first network, said authorisation information having data related to an entitlement to quality of service for said user equipment; holding said authorisation information at said user equipment; performing a comparison of said entitlement to quality of service with a quality of service provided by the second network; and in dependence on said comparison, sending a message from said user equipment to the second network requesting an upgrade of quality of service.
    • 本发明一般涉及通信系统,更具体地但并非排他地涉及一种用于通信系统中的用户设备的服务质量控制的方法和装置,所述通信系统包括相对于用户设备和被访问网络的归属网络。 根据本发明的第一方面,提供了一种在包括第一网络和第二网络的通信系统中的用户设备的服务质量控制方法,所述第一网络是相对于所述用户的归属网络 设备和第二网络是相对于所述用户设备的被访问网络,所述方法包括:从所述第一网络在所述用户设备处接收授权信息,所述授权信息具有与所述用户设备的服务质量有关的数据; 在所述用户设备上持有所述授权信息; 将所述授权与服务质量的比较与由第二网络提供的服务质量进行比较; 并且根据所述比较,从所述用户设备向第二网络发送请求升级服务质量的消息。