Two-way authentication system of player and projector for digital movies mobile playing

Abstract

The invention discloses a two-way authentication system of a player and a projector for digital movies mobile playing. The hardware of the system is authentication modules installed in the player and the projector, wherein, the authentication module comprises a random number generator, an encryption module, a decryption module and a comparator; the authentication modules operate as follows by combining software in the system: the random number generator in the authentication module in the player generates random numbers at intervals, transfers the random numbers to the encryption module to be encrypted and then sends the data to the projector; the authentication module in the projector receives the data encrypted by the player via a video interface, the decryption module decrypts the data and then transfers the decrypted data back to the player, after the player receives the data, the comparator in the authentication module judges whether the decrypted data are consistent with the data sent before and transmits the comparison results to the player for further processing; the projector also adopts the same way to carry out authentication with the player. The system is high in information security, easy to realize, low in cost and suitable for wide popularization.

Description

technical field [0001] The invention relates to a digital movie projection management device, in particular to a method for two-way authentication between a digital movie streaming projection player and a projector and a playback and projection device for a digital movie streaming projection system. Background technique [0002] "Project 2131" is a cross-century rural film project and cultural construction project proposed by the State Administration of Radio, Film and Television, the Ministry of Culture and other five ministries and commissions in 1998 (that is, in the 21st century, every administrative village (community) will show a film every month. the goal of the movie). The State Administration of Radio, Film and Television promulgated the technical guidance document GD / J103-2007 "Technical Requirements for Digital Movie Mobile Projection" to standardize the design and operation of digital movie mobile projection systems (including players, projectors, audio amplifier...

AI Technical Summary

Problems solved by technology

However, when the playback device and the projection device communicate with each other, the data is always the same unencrypted ID information, which is easy to be intercepted and cracked, and its authentication is only a one-way identity authentication from the playback device to the projection device, which does not guarantee that the projector can be authenticated. player, so that the projection device can be used with other playback devices, and the specificity of the device cannot be guaranteed

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