Integrated Greenhouse gas emission from paddy fields in China

Session 2: Nitrogen, Green House Gasses and Agricultur

A Great Challenge to Solve Nitrogen Pollution from Intensive Agriculture

Session 2: Nitrogen, Green House Gasses and Agricultur

Understanding Methane Emission from Rice Paddies in China

Symposium Pape

The Realizations of Steganography in Encrypted Domain

With the popularization and application of privacy protection technologies in cloud service and social network, ciphertext has been gradually becoming a common platform for public to exchange data. Under the cover of such a plat-form, we propose steganography in encrypted domain (SIED) in this paper to re-alize a novel method to realize secret communication Based on Simmons' model of prisoners' problems, we discuss the application scenarios of SIED. According to the different accesses to the encryption key and decryption key for secret mes-sage sender or receiver, the application modes of SIED are classified into four modes. To analyze the security requirments of SIED, four levels of steganalysis attacks are introduced based on the prior knowledge about the steganography system that the attacker is assumed to obtain in advance. Four levels of security standards of SIED are defined correspondingly. Based on the existing reversible data hiding techniques, we give four schemes of SIED as practical instances with different security levels. By analyzing the embedding and extraction characteris-tics of each instance, their SIED modes, application frameworks and security lev-els are discussed in detail

Diurnal pattern of nitrous oxide emissions from a sewage-enriched river : references to IPCC indirect emission factor

Poster Sessio