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The present work deals with a new symmetric key cryptographic method using dynamic key. The demand for adequate security to electronic data system grows high over the decades. In the present work the authors have used the Linear Congruential Generator (LCG) for generating key. This is a block cipher technique. The advantage of the present method is that for(More)
In the present work, a block cipher is presented which deals with a dynamic symmetric key cryptographic method using substitution and transposition technique. In this work a dynamic secret key is generated using Linear Congruential Generator (LCG). The striking feature of the present work is creation of a new secret key for every pair of encryption and(More)
Conference Key Management (CKM) is one of the primary issues in Secure Dynamic Conferencing (SDC). In this paper, we propose a novel CKM scheme for SDC based on the secret sharing principle and the novel concept/introduction of randomised access polynomial. Our scheme is simple, efficient, scalable, practical, dynamic and outperforms existing CKM schemes in(More)
Applications like e-newspaper or interactive online gaming typically have more than one resource and a large number of users. There is a many-to-many relationship between users and resources, each user can access multiple resources and each resource can be accessed by multiple users. Each resource needs to be encrypted by a different resource encryption key(More)
This paper presents the design and characterization of two resistive mixers integrated with a double-slot antenna in a 100-nm GaAs mHEMT technology. With RF frequency varying from 185 to 202 GHz, a typical conversion loss (<i>L c</i>) of 8.0 dB is measured for the single-ended mixer and a typical <i>L c</i> of 12.2 dB is obtained from one of the two IF(More)
Sub-Harmonic resistive HEMT based mixers in Gband have been designed and integrated with Double Slot Antenna in Differential Configuration for the first time. This novel topology shows compact integration of active devices between antenna ports while achieving 25 GHz bandwidth around 200 GHz. The dual-gate 50nm x 15um InP HEMT used in the design achieves(More)
For linear multi-pixel imaging systems, a linear stack of pixels comprising of an antenna and a heterodyne receiver are needed. Such pixels can be realized using MMIC processes. The main constraint for such multi-pixel system is a compact array of pixels giving high coupling to quasi-optics used for focusing. This paper addresses this trade-off and presents(More)
Applications like e-newspaper or interactive online gaming have more than one resource and a large number of users. There is a many-to-many relationship between users and resources; each user can access multiple resources and multiple users can access each resource. The resources are independent and each resource needs to be encrypted by a different(More)
The Eleven feed is a log-periodic array of parallel dipoles in Eleven (II) configuration. It exhibits constant beam width and phase center position over a decade bandwidth, and finds therefore application as a wideband feed for reflector antennas. The present paper gives a summary of the present performance of a 2&#x2013;14 GHz Eleven feed that is under(More)
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