Encryption is a process in which the sender encrypts or scrambles the message in such a way that only the recipient will be able to decrypt the message with the knowledge of the proper key. With the growth of internet, the need for secure data transmission become more essential and important, as security is a major concern in the internet world. So the plain text should be codified by the process of encryption. Different types of data have their own features, thus different techniques should be used to protect confidential data from unauthorized access. In this paper proposed in bit level encryption and decryption algorithm based on number of keys which can encrypt the 8 bit binary no to its corresponding 8 bit cipher text and a decryption algorithm which can convert that 8 bit cipher text to its corresponding 8 bit original no. It can also be extended to 16, 32 bit binary number.
Field analysis for coaxial cavity with triangular corrugations on the inner rod (insert) to be used for megawattclass gyrotron has been done. Mathematical formulation for its dispersion relation, wall losses, and quality factor has been presented. Quality factor for open-ended triangular corrugated cavity has been computed by solving Vlasov's equation. The advantage of the mentioned structure is that it offers higher number of slots to be accommodated, which reduces the wall losses in the insert without causing heating problems between the slots. Incorporating corrugations on the insert leads to significant changes in the field structure inside the cavity. The mode eigenvalue, wall losses, and quality factor for such a cavity have been found to be heavily dependant on radii ratio (C = R 0 /R i ). Quality factor of desired and competing modes can be controlled by integrating a tapered insert. A coaxial cavity design for 204 GHz, 2 MW with TE 44,26 as a desired mode is given. Wall losses, quality factor, and coupling coefficient for desired and competing modes have been calculated.Index Terms-Coaxial cavity gyrotron, diffractive quality factor, ohmic quality factor, surface impedance method (SIM).
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