International Association for Cryptologic Research

International Association
for Cryptologic Research


Paris Kitsos

Affiliation: Hellenic Open University (HOU)


On the Hardware Implementation of the MICKEY-128 Stream Cipher
Paris Kitsos
Encryption algorithms are becoming more necessary to ensure the securely transmitted data over insecure communication channels. MICKEY-128 is a recently developed stream cipher with two major advantages: (i) the low hardware complexity, which results in small area and (ii) the high level of security. FPGA device was used for the performance demonstration. Some of the first results of implementing the stream cipher on an FPGA are reported. A maximum throughput equal to 170 Mbps can be achieved, with a clock frequency of 170 MHz.
Architectures and Hardware Implementations of the 64-bit MISTY1 Block Cipher
Two alternative architectures and VLSI implementations of the 64-bit NESSIE proposal, MISTY1 block cipher, are presented in this paper. For these implementations, FPGA devices were used. The first architecture is suitable for applications with high throughput requirements. A throughput of up to 7.2 Gbps can be achieved at a clock frequency of 96 MHz. The main characteristic of this implementation is that uses RAM blocks that are embedded in the FPGA device in order to implement the necessary by the algorithm S-boxes. The second architecture can be used in applications with constrained hardware resources. It uses feedback logic and inner pipeline with negative edge-triggered register. So, it causes the critical path to be shorter, without increasing the latency of the cipher execution. Compared with an implementation without inner pipeline, performance improvement of 97% is achieved. The measured throughput of the second architecture implementation is 561 Mbps at 79 MHz.

Program Committees

CHES 2011


M. D. Galanis (1)
O. Koufopavlou (1)