This paper presents a method for differen- tial collision attack of reduced FOX block cipher based on 4-round distinguishing property. It can be used to attack 5, 6 and 7-round FOX64 and 5-round FOX128. Our attack has...This paper presents a method for differen- tial collision attack of reduced FOX block cipher based on 4-round distinguishing property. It can be used to attack 5, 6 and 7-round FOX64 and 5-round FOX128. Our attack has a precomputation phase, but it can be obtained before attack and computed once for all. This attack on the reduced to 4-round FOX64 requires only 7 chosen plaintexts, and performs 242.8 4-round FOX64 encryptions. It could be extended to 5 （6, 7）-round FOX64 by a key exhaustive search behind the fourth round.展开更多
In an examination of the contemporary transformation of journalism at a granular level, this article exposes the process at work in the cultural construction of crisis and struggles for institutional experimentation i...In an examination of the contemporary transformation of journalism at a granular level, this article exposes the process at work in the cultural construction of crisis and struggles for institutional experimentation in the New Orleans based The Times-Picayune. Layoffs and a digital-first strategy in 2012 triggered public outcry that strongly polluted the changes as anti-democratic. A narrative analysis of articles published in a variety of media and in-depth interviews with journalists and editors showed that events were related to broad and systemic cultural values, a core cultural structure inherent in every journalistic institution--including The Times- Picayune. In their narrative dimension, journalistic stories took the form of a moral texture that, in turn, fostered civil interpretations and reactions. The available narratives of the changes were--and still are--filtered, selected, and outlined from those core values.展开更多
基金This work has been performed in the Project "The Research on the New Analysis in Block Ciphers" supported by the Fundamental Research Funds for the Central Universities of China，the National Natural Science Foundation of China，the 111 Project of China，the Scientific Research Foundation of Education Department of Shaanxi Provincial Government of China
文摘This paper presents a method for differen- tial collision attack of reduced FOX block cipher based on 4-round distinguishing property. It can be used to attack 5, 6 and 7-round FOX64 and 5-round FOX128. Our attack has a precomputation phase, but it can be obtained before attack and computed once for all. This attack on the reduced to 4-round FOX64 requires only 7 chosen plaintexts, and performs 242.8 4-round FOX64 encryptions. It could be extended to 5 （6, 7）-round FOX64 by a key exhaustive search behind the fourth round.
文摘In an examination of the contemporary transformation of journalism at a granular level, this article exposes the process at work in the cultural construction of crisis and struggles for institutional experimentation in the New Orleans based The Times-Picayune. Layoffs and a digital-first strategy in 2012 triggered public outcry that strongly polluted the changes as anti-democratic. A narrative analysis of articles published in a variety of media and in-depth interviews with journalists and editors showed that events were related to broad and systemic cultural values, a core cultural structure inherent in every journalistic institution--including The Times- Picayune. In their narrative dimension, journalistic stories took the form of a moral texture that, in turn, fostered civil interpretations and reactions. The available narratives of the changes were--and still are--filtered, selected, and outlined from those core values.
