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Peasants Should Enjoy Equal Social Security Right with Urban Dwellers

According to the Constitution of the People’s Republic of China and the effective conventions therein, every citizen should enjoy equal right of social security. But in reality, a peasant has much less such right than an urban dweller, only because of their different hukou. Peasants, as part of the investors of state-owned property, should have the rights of owners and enjoy the benefits from t...

Multimedia Security Handbook

Multimedia Security Techniques

Image, which covers the highest percentage of the multimedia data, its protection is very important. This can be achieved by cryptography. Image encryption plays an important role to ensure confidential transmission and storage of image over internet.It becomes an important issue that how to protect the confidentiality, integrity, and authenticity of image.A real–time image encryption faces a g...

Multimedia Security: Watermarking Techniques

A recent proliferation and success of the Internet, together with availability of relatively inexpensive digital recording and storage devices has created an environment in which it became very easy to obtain, replicate and distribute digital content without any loss in quality. This has become a great concern to the multimedia content (music, video, and image) publishing industries, because te...

Constructability of Trip-lets

A trip-let is an object as shown on the cover of Hofstadter’s book Gödel, Escher, Bach: a solid, threedimensional object that, when viewed from three orthogonal directions, shows three different letters. In this paper we consider two problems related to the construction of such objects for a given set of three letters. First, we want to know whether the silhouettes of the object correspond to t...