Quantifying Information Flow During Emergencies
نویسندگان
چکیده
منابع مشابه
Quantifying Information Flow During Emergencies
Recent advances on human dynamics have focused on the normal patterns of human activities, with the quantitative understanding of human behavior under extreme events remaining a crucial missing chapter. This has a wide array of potential applications, ranging from emergency response and detection to traffic control and management. Previous studies have shown that human communications are both t...
متن کاملQuantifying Information Flow
We extend definitions of information flow so as to quantify the amount of information passed; in other words, we give a formal definition of the capacity of covert channels. Our definition uses the process algebra CSP, and is based upon counting the number of different behaviours of a high level user that can be distinguished by a low level user.
متن کاملQuantifying information flow with beliefs
To reason about information flow, a new model is developed that describes how attacker beliefs change due to the attacker’s observation of the execution of a probabilistic (or deterministic) program. The model enables compositional reasoning about information flow from attacks involving sequences of interactions. The model also supports a new metric for quantitative information flow that measur...
متن کاملQuantifying information flow with constraints
Quantifying flow of information in a program involves calculating how much information (e.g. about secret inputs) can be leaked by observing the program’s public outputs. Recently this field has attracted a lot of research interest, most of which makes use of Shannon’s information theory, e.g. mutual information, conditional entropy, etc. Computability entails that any automated analysis of inf...
متن کاملInformation spreading during emergencies and anomalous events
The most critical time for information to spread is in the aftermath of a serious emergency, crisis, or disaster. Individuals affected by such situations can now turn to an array of communication channels, from mobile phone calls and text messages to social media posts, when alerting social ties. These channels drastically improve the speed of information in a time-sensitive event, and provide ...
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ژورنال
عنوان ژورنال: Scientific Reports
سال: 2014
ISSN: 2045-2322
DOI: 10.1038/srep03997