Informatics Publishing Limited

D. Shrivishwanath ¹, N. R. Raajan ¹, L. Gopinath ¹

Affiliations
1 School of Electrical & Electronics Communication, SASTRA University, Thanjavur, Tamil Nadu, IN

Abstract

Data transmission has become very common in human's daily life. This data transmission can be confidential or the data may be intended for a section of people. The data that is intended to be transmitted to a particular recipient should be read only by the corresponding person and not anyone else. For this reason, the best way to protect the data is by encryption. This provides security from stealing of data. This paper deals with a mechanism to encrypt a data using flip-flops and double substitution method. The basic idea to obtain blocks of plain text and then use T-flip-flops along with double substitution to result in a convincing cipher text. The result is a cipher text obtained by using plaintext itself for encryption. This algorithm can be used to transmit bit sequence of any length, thus ensuring the usage of bandwidth to desirable level. This method may result in an Electronic Code Book (ECB). The keys used will be asymmetric. The receiver just follows the steps in reverse order to retrieve the data or plaintext from the received cipher text.

Keywords

Cipher Text, ECB, Encryption, Plaintext, Substitution Method, T-flip-flop

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L. Gopinath ¹, S. Ravishankar ²

Affiliations
1 Centre for Civil Aircraft Design and Development, Council for Scientific and Industrial Research - National Aerospace Laboratories, Bangalore, IN
2 Aircraft Prototype Manufacturing Facility, Council for Scientific and Industrial Research - National Aerospace Laboratories, Bangalore, IN

Abstract

This paper describes the application of Walking Line Assembly (WLA) in prototype fabrication of yoke sub-assembly and its effectiveness. The technical aspects and challenges involved in development and fabrication of engine mount yoke tube assembly for a civil aircraft are presented. Activities representing reverse engineering process and fabrication of yoke tube are detailed comprehensively. WLA model adopted for this assembly is compared with conventional methods and fixed layouts. Further, WLA model is modified with a common stage set on every process where the expected capability of the task in the shop floor is brought out in consensus with the operational demand and standards. This is achieved with very little disturbance to the existing aircraft fixed line fabrication set up. This model has given encouraging results by expediting the processes and provides an ideal option for building of prototypes in the development stage of an aircraft project.

Keywords

Engine Mount Assembly, Model Effectiveness, Reverse Engineering, Walking Line Assembly.

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