Commenced in January 2007
Frequency: Monthly
Edition: International
Paper Count: 2

Mars Related Publications

2 Improved MARS Ciphering Using a Metamorphic-Enhanced Function

Authors: A. Baith Mohamed, Moataz M. Naguib, Hatem Khater

Abstract:

MARS is a shared-key (symmetric) block cipher algorithm supporting 128-bit block size and a variable key size of between 128 and 448 bits. MARS has a several rounds of cryptographic core that is designed to take advantage of the powerful results for improving security/performance tradeoff over existing ciphers. In this work, a new function added to improve the ciphering process it is called, Meta-Morphic function. This function use XOR, Rotating, Inverting and No-Operation logical operations before and after encryption process. The aim of these operations is to improve MARS cipher process and makes a high confusion criterion for the Ciphertext.

Keywords: Cryptography, Mars, AES, metamorphic, block cipher

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1 Preliminary Assessment of Feasibility of a Wind Energy Conversion System for a Martian Probe or Surface Rover

Authors: M. Raciti Castelli, E. Benini, M. Cescon

Abstract:

Nuclear energy sources have been widely used in the past decades in order to power spacecraft subsystems. Nevertheless, their use has attracted controversy because of the risk of harmful material released into the atmosphere if an accident were to occur during the launch phase of the mission, leading to the general adoption of photovoltaic systems. As compared to solar cells, wind turbines have a great advantage on Mars, as they can continuously produce power both during dust storms and at night-time: this paper focuses on the potential of a wind energy conversion system (WECS) considering the atmospheric conditions on Mars. Wind potential on Martian surface has been estimated, as well as the average energy requirements of a Martian probe or surface rover. Finally, the expected daily energy output of the WECS has been computed on the basis of both the swept area of the rotor and the equivalent wind speed at the landing site.

Keywords: Mars, Wind turbine, probe, Wind potential, surface rover

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