Compact and high-speed hardware architectures and logic optimization methods for the AES algorithm Rijndael are described. Encryption and decryption data. look-up table logic or ROMs in the previous approaches, which requires a lot of hardware support. Reference [16] proposed the use of. Efficient Hardware Architecture of SEED S-box for . In order to optimize the inverse calculation, we . “A Compact Rijndael Hardware Architecture with. S- Box.

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The other two approaches consume three times as much power as the proposed design, while hw-lut [ 24 ] consumes about four times more power. To clarify the results obtained, the case of processing four bytes in parallel is considered here without pipelining.

Introduction Encryption algorithms are broadly classified as symmetric and asymmetric algorithms based on the type of keys used. Here the S-box operation is divided into the Galios Field multiplication and its inverse operation and later illustrated in a step-by-step manner. The proposed architecture consists of two parts: All the literatures are not shown in the graph because the normalized outcome of some literatures is too large compared to the proposed designs.

With a byte state, the architecture architecure allows varying the bytes processed from a single byte at a time to 16 bytes in parallel with power of twos increments, i.

Now-a-days there are a lot of applications coming in the market where an increasing number of battery-powered embedded systems like PDAs, cell phones, networked sensors, smart cards, RFID etc. Bertoni [ 23 ]. A sith time S-Box construction using arithmetic modulo prime numbers.

By introducing a new composite field, the S-Box structure is also optimized. Similarly, 4-to—1 multiplexers are constructed out of 2-to—1 ones. Among all the three proposed architectures the simulation result that is provided here is the third one. However, it may be necessary to add a large number of additional flip-flops when the pipeline stage is placed between the decoder and encoder. This material is based upon work supported by the Institute of Information and Communication Technology under Bangladesh University of Engineering and Technology.


It is seen that internal routing of embedded system block is more power efficient than the routing used for general purpose logic. Throughput Data rate units Mathematical optimization S-box.

Eventually, this makes security a very important concern. We conclude in Section 7. Delay and area values for the existing techniques are obtained from the survey done by Tillich et al [ 24 ]. Aproximacion metodologica para la implementacion asincrona del algoritmo de Rijndael. Once decoding on the group, row, and column levels are done, the LUT to rijndaeo used is known. Due to the complexity of asymmetric algorithms, symmetric ciphers are always preferred for their speed and simplicity.

On the other hand, these structures have a relatively long critical path. The S-box computation involves basically two steps, the multiplicative inverse and the affine transformation.

The T-box AES design is intended to have high throughput and low power usage [ 20 ]. The multiplicative inverse is complex to perform in GF 2 8so in order to simplify, composite field arithmetic is used by some researchers.

Therefore, a change of a few input bits affects the evaluation of all output bits separately.

A Compact Rijndael Hardware Architecture with S-Box Optimization – Semantic Scholar

So the latency is 4. Given that every four bytes of a state are processed simultaneously, the total delay is eight times that of a 2-to—1 multiplexer.


The size of SubBytes is, in turn, determined by the number of S-boxes and their concrete implementation. Amongst the three implementations at the bottom of the Fig 9our proposed Design—3 is clearly the best.

In the first layer, an 8 X 8 S-box is applied to each byte. Conference on Field Programmable Logic and Application, pp- — The selection of groups, rows, and columns is implemented using decoders. Citation Statistics Citations 0 50 ’01 ’04 ’08 ’12 ‘ The performance analysis of the proposed and simulated design is on the 0.

Author information Article notes Copyright and License information Disclaimer. The use of smaller look up tables LUTs of different sizes ranging from 16 to bytes has become more reliable for getting higher speed. Our proposed design will explain how the hardware look-up table works efficiently in the next couple of sections.

Each legend cites the functions in the same top—down order as they are contained in the respective Fig. Table 4 Delay, Power and Area Comparisons.

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IEEE international symposium on circuits and system, pp- — Some literatures provided good results for FPGA implementations too. Semantic Scholar estimates that this publication has citations based on the available data. The mapping of LUTs is provided by the following pseudo code: