AES coprocessor system and AES structure in wireless sensor network node application

A wireless sensor and network node technology, applied in transmission systems, digital transmission systems, encryption devices with shift registers/memory, etc. Data, the effect of reducing design area and power consumption

Inactive Publication Date: 2009-11-25
PEKING UNIV SHENZHEN GRADUATE SCHOOL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to overcome the shortcomings of excessive hardware cost and power consumption in most existing AES coprocessor designs, which are not suitable for integration in wireless network nodes, the present invention proposes a design based on a system-level framework based on multiplexing technology method

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  • AES coprocessor system and AES structure in wireless sensor network node application
  • AES coprocessor system and AES structure in wireless sensor network node application
  • AES coprocessor system and AES structure in wireless sensor network node application

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Embodiment Construction

[0022] The invention supports a half-duplex working mode, and can perform encryption / decryption operations separately, and the same module only needs to perform one operation of encryption / decryption at the same time. Only one encrypt signal is needed to distinguish. The encrypt signal controls the key selection of the s-box, mixcolumn and key register for encryption and decryption multiplexing, and whether the cycle key performs inv-mixcolumn operation, etc. In this way, the same module can realize both the encryption operation and the decryption operation. For wireless sensor networks with low speed requirements, this is also beneficial to reduce the area.

[0023] The data interface of the module is 32 bits, and the input and output adopt independent interfaces. The input and output of plaintext / ciphertext are both 32 bits, which are serially input and output in four cycles. While outputting the cipher / plaintext after encryption / decryption, the next set of ciphertext / ciph...

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Abstract

In order to overcome the defects of overlarge hardware cost and power consumption and unsuitable integration in a wireless sensor network node in the design of a plurality of prior AES coprocessors, the invention provides a module reuse method in AES coprocessors apply for wireless sensor network node. The method mainly utilizes the multiplexing technology and process optimization to finish an encrypting and decrypting function by fewest submodules. The AES structure process adopts multiplexing ways of internal turn resource share, each high level module multiplexing submodules and external turn single cycle and can encrypts / decrypts. The invention can reduce application cost and hardware expenditure and effectively lower power consumption on the basis of ensuring reliable data, and the system throughput rate also conforms to the requirement of a wireless sensor network and is suitable for using VLSI hardware. In the special application of the wireless sensor network node, an AES encrypting and decrypting coprocessor in the structure can be closer to practical application as supplying the reliable data.

Description

Technical field [0001] The invention relates to an encryption and decryption algorithm, especially a design method and system of an AES coprocessor in a low-cost and low-power consumption specific environment of a wireless sensor network node. Background technique [0002] In recent years, due to the wide application prospects, the research of wireless networked smart sensors has attracted great attention from all parties, and has become a research hotspot, but there are many factors to be considered or problems to be studied. Security is an important aspect of this. Nowadays, wireless networks are widely used, but wireless networks lack sufficient security due to their special transmission methods, and the information transmitted on the network will be threatened by illegal eavesdropping, tampering and destruction at any time. Using data encryption technology to encrypt information can greatly improve the security of wireless networks. With the continuous development of W...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/06H04L9/28H04L12/28
CPCY02B60/50
Inventor 李玉文张兴蒋安平曹健
Owner PEKING UNIV SHENZHEN GRADUATE SCHOOL
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