'Extension field' diaporamas de présentation

Computer Network Time Synchronization: the Network Time Protocol

Computer Network Time Synchronization: the Network Time Protocol. David L. Mills University of Delaware http://www.eecis.udel.edu/~mills mailto:mills@udel.edu. Introduction. Network Time Protocol (NTP) synchronizes clocks of hosts and routers in the Internet.

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Network Time Protocol: Past, Present and Future

Network Time Protocol: Past, Present and Future. David L. Mills University of Delaware http://www.eecis.udel.edu/~mills mailto:mills@udel.edu. Overview. NTP architecture, protocol and algorithms Twenty years of analysis, modeling and refinement Splitting the microsecond

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NTP Architecture, Protocol and Algorithms

NTP Architecture, Protocol and Algorithms. David L. Mills University of Delaware http://www.eecis.udel.edu/~mills mailto:mills@udel.edu. Process decomposition. Peer process runs when a packet is received.

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Diffie-Hellman ???????

Diffie-Hellman ???????. ??. Diffie-Hellman ?? ?????? ?? Diffie-Hellman ??????? ????? Diffie-Hellman ?? ????? (GL n ) ?? Diffie-Hellman ?? ??. Diffie-Hellman ??. Diffie-Hellman Conjecture. Discrete Logarithm Problem (DLP) To find z given g z Diffie-Hellman problem (DHP)

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REED SOLOMON CODES

CHANNEL CODING. REED SOLOMON CODES. General Description:. Reed-Solomon (R-S) codes are nonbinary cyclic codes with symbols made up of m-bit sequences, where m is any positive integer having a value greater than 2. For the most conventional R-S (n, k) code: (n, k) = (2 m - 1, 2 m -1 - 2t)

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Introduction

Preparation. Main result. Introduction. Conclusion. A Method for Constructing A Self-Dual Normal Basis in Odd Characteristic Extension Field. Department of Communication Network Engineering, Faculty of Engineering, Okayama University, Japan

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A Security Analysis of Network Time Protocol

A Security Analysis of Network Time Protocol. Paper by Matt Bishop, 1991. Andy Hospodor COEN 317 11/03/03. Sequence. NTP Architecture Overview of Security features Types of attacks on NTP Countermeasures Further reading. Where does time come from?.

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Fields as Quotients of Polynomial Rings

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Definitions

Definitions. group , ring and field polynomial over a field F degree of a polynomial over F F[x] degree of a polynomial in F[x] gcd of two polynomials from F[x] irreducible polynomial over F function induced by a polynomial root of a polynomial

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