公开(公告)号：US09225516B1

公开(公告)日：2015-12-29

申请号：US14045192

申请日：2013-10-03

Applicant: WhatsApp Inc.

Inventor： Bryan D. O'Connor ,  Eugene Fooksman

IPC: G06F7/04 ,  H04L9/08 ,  H04L9/32

CPC classification number: H04L9/3271 ,  H04L9/0819 ,  H04L9/0863 ,  H04L9/3234 ,  H04L9/3297

Abstract: A system and methods are provided for establishing an authenticated and encrypted communication connection between two devices with at most two round-trip communications. During establishment of an initial authenticated, encrypted communication connection (or afterward), a first device (e.g., a server) provides the second device (e.g., a client) with a token (e.g., a challenge) that lives or persists beyond the current connection. After that connection is terminated and the second device initiates a new connection, it uses the token as part of the handshaking process to reduce the necessary round-trip communications to one.

Abstract translation: 提供了一种用于在具有至多两个往返通信的两个设备之间建立认证和加密的通信连接的系统和方法。 在建立初始认证的加密通信连接（或之后）期间，第一设备（例如，服务器）向第二设备（例如，客户端）提供存在或持续超过当前的令牌（例如，挑战） 连接。 在该连接终止并且第二设备发起新的连接之后，它使用令牌作为握手过程的一部分，以将必要的往返通信减少到一个。

公开(公告)号：US08918473B1

公开(公告)日：2014-12-23

申请号：US13647957

申请日：2012-10-09

Applicant: WhatsApp Inc.

Inventor： Bryan D. O'Connor

IPC: G06F15/16

CPC classification number: H04L51/12 ,  G06Q10/107 ,  H04L43/10 ,  H04L43/16 ,  H04L67/02 ,  H04L67/22

Abstract: A system and method for detecting unwanted electronic content, such as spam. As a user operates an application to send messages, several metrics are tracked to allow the system to analyze her activity. Illustrative metrics may include, but are not limited to, block count (e.g., how many other users have blocked her), block rate (e.g., the rate at which other users block her), peer symmetry (e.g., percentage of her messages that are to other users that have her in their address book), message uniqueness (e.g., how unique her messages are from each other), peer uniqueness (e.g., how unique the addressees of her messages are), message rate (e.g., the rate at which she sends messages). Periodically, metrics may be compared to corresponding thresholds. Depending on whether a threshold is crossed, and which threshold is crossed, she may be banned from using the application or placed on a watch list.

Abstract translation: 用于检测诸如垃圾邮件的不需要的电子内容的系统和方法。 当用户操作应用程序来发送消息时，会跟踪多个度量标准，以允许系统分析她的活动。 说明性度量可以包括但不限于块计数（例如，其他用户已经阻止了多少其他用户），阻塞率（例如，其他用户阻止她的速率），对等体对称性（例如，她的消息的百分比 消息唯一性（例如，她的消息如何独特），对等唯一性（例如，她的消息的收件人的独特性），消息速率（例如，速率 她发送消息）。 定期地，度量可以与相应的阈值进行比较。 根据是否超过阈值，以及哪个阈值越过，她可能被禁止使用应用程序或放置在监视列表中。