منابع مشابه
Geoencryption Using Loran
Geoencryption is the use of position navigation and time (PNT) information as means to enhance the security of a traditional cryptographic system. The information is used to generate an additional security key, a “geolock”, that is necessary to access the encrypted data or application. The concept was originally proposed by Logan Scott and Dorothy Denning. This paper examines the benefits of us...
متن کاملGeoencryption with Loran
The term “geoencryption” or “location-based encryption” refer to a security algorithm that limits the access or decryption of information content to specified locations and/or times. The algorithm does not replace any of the conventional cryptographic algorithms, but instead adds an additional layer of security. Loran is chosen as a case study to implement geoencryption due to its many properti...
متن کاملDifferential Loran-C
The U. S Coast Guard and Federal Aviation Administration are cooperating in a major effort to define and analyze the performance of a new Enhanced Loran system as a backup for GPS provided services. Each transportation mode has defined requirements that the new Enhanced Loran must meet to be acceptable in the radionavigation mix of systems. The USCG developed a set of requirements for Loran mar...
متن کاملThe Loran Integrity Performance Panel
LOng RAnge Navigation, Loran, is an attractive candidate to provide redundant services for GPS because of its complementary RNAV, stratum 1 timing, and data channel capabilities. However, for Loran to be accepted as a redundant navigation system for aviation, it must meet the accuracy, availability, integrity, and continuity standards for Required Navigation Performance 0.3 (RNP 0.3). The Loran...
متن کاملLoran Coverage Availability Simulation Tool
The Loran coverage availability simulation tool (LCAST) was initially created for the 2004 Federal Aviation Administration (FAA) Loran technical evaluation report. The tool incorporated the then current models, algorithms and figures of merit being developed for the evaluation report. Models for noise, noise mitigation, signal strength, additional secondary factor (ASF), and envelope to cycle d...
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ژورنال
عنوان ژورنال: PS: Political Science & Politics
سال: 2010
ISSN: 1049-0965,1537-5935
DOI: 10.1017/s1049096510990902