公开(公告)号：US09130997B2

公开(公告)日：2015-09-08

申请号：US14296435

申请日：2014-06-04

Applicant: Facebook, Inc.

Inventor： Christopher Alexander Stein ,  Karan Mangla ,  Zhimin Chen ,  Erdong Chen

IPC: H04L29/06 ,  G06F21/56

CPC classification number: H04L63/20 ,  G06F21/56

Abstract: Behavior of an online system is modified dynamically using feature expressions and feature loops. A feature expression can be expressed as a combination of other features or feature expressions, thereby allowing specification of complex features. The sets of feature expressions and policies of an online system can be modified while the online system is running. Feature loops aggregate values of a feature expression across a plurality of actions, for example, number of occurrences of an event over a time interval. The online system evaluates a set of feature expressions in response to actions performed by users. Feature expressions are used to specify policies that determine how the online system reacts to certain types of user actions. The ability to dynamically modify the feature expressions and policies of the online system allows the online system to adapt to attacks by malicious users in a timely manner.

Abstract translation: 使用特征表达式和特征循环动态修改在线系统的行为。 特征表达式可以表示为其他特征或特征表达式的组合，从而允许指定复杂特征。 在线系统运行时，可以修改在线系统的功能表达式和策略集。 特征循环跨多个动作聚合特征表达式的值，例如在时间间隔内事件的发生次数。 在线系统评估一组特征表达式以响应用户执行的动作。 功能表达式用于指定用于确定在线系统如何对某些类型的用户操作做出反应的策略。 动态修改在线系统的功能表达式和策略的能力使得在线系统能够及时适应恶意用户的攻击。

公开(公告)号：US20140289795A1

公开(公告)日：2014-09-25

申请号：US14296435

申请日：2014-06-04

Applicant: Facebook, Inc.

Inventor： Christopher Alexander Stein ,  Karan Mangla ,  Zhimin Chen ,  Erdong Chen

IPC: H04L29/06

CPC classification number: H04L63/20 ,  G06F21/56

Abstract: Behavior of an online system is modified dynamically using feature expressions and feature loops. A feature expression can be expressed as a combination of other features or feature expressions, thereby allowing specification of complex features. The sets of feature expressions and policies of an online system can be modified while the online system is running. Feature loops aggregate values of a feature expression across a plurality of actions, for example, number of occurrences of an event over a time interval. The online system evaluates a set of feature expressions in response to actions performed by users. Feature expressions are used to specify policies that determine how the online system reacts to certain types of user actions. The ability to dynamically modify the feature expressions and policies of the online system allows the online system to adapt to attacks by malicious users in a timely manner.

Abstract translation: 使用特征表达式和特征循环动态修改在线系统的行为。 特征表达式可以表示为其他特征或特征表达式的组合，从而允许指定复杂特征。 在线系统运行时，可以修改在线系统的功能表达式和策略。 特征循环跨多个动作聚合特征表达式的值，例如在时间间隔内事件的发生次数。 在线系统评估一组特征表达式以响应用户执行的动作。 功能表达式用于指定用于确定在线系统如何对某些类型的用户操作做出反应的策略。 动态修改在线系统的功能表达式和策略的能力使得在线系统能够及时适应恶意用户的攻击。