'Linear feedback shift registers' diaporamas de présentation

Applied Cryptography

651 views • 52 slides

Stream Cipher

Stream Cipher. Stream Cipher. A stream cipher breaks the message M into successive characters or bits m 1 , m 2 , ..., and enciphers each m i with the ith element k i of a key stream K=k 1 k 2 ...; that is, E K (M)=E k1 (m 1 )E k2 (m 2 ). Periodic.

1.6k views • 44 slides

Coding and Error Control

Coding and Error Control. Chapter 8. Coping with Data Transmission Errors. Error detection codes Detects the presence of an error Automatic repeat request (ARQ) protocols Block of data with error is discarded Transmitter retransmits that block of data

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Summary From the Last Lecture

Summary From the Last Lecture. We spoke about defense challenges Crypto introduction Secret key, public algorithms Symmetric, asymmetric crypto, one-way hashes Attacks on cryptography Cyphertext -only, known plaintext, chosen plaintext, MITM, brute-force Types of ciphers

576 views • 39 slides

Coding and Error Control

Coding and Error Control. Chapter 8. Coping with Data Transmission Errors. Error detection codes Detects the presence of an error Automatic repeat request (ARQ) protocols Block of data with error is discarded Transmitter retransmits that block of data

554 views • 37 slides

FABLAB Delhi

FABLAB Delhi. Dhananjay V. Gadre. List of Projects. Flickering Candle Electronic Batteryless dice Led Pen Electronic Birthday Blowout Candles Audio Spectrum Analyzer Twilight Switch. Flickering LED candle. Flickering Candle. An LED can be used to mimic candle light.

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ELEC5616 computer and network security

ELEC5616 computer and network security. matt barrie mattb@ee.usyd.edu.au. pseudorandom number generators. Sources of random numbers are desirable in many applications: Session keys Deck shuffling Challenges Nonces Unfortunately truly random sources are not easy to come by:

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An Introduction to Verilog: Transitioning from VHDL

An Introduction to Verilog: Transitioning from VHDL. Tutorial 1. Lesson Plan (Tentative). Week 1: Transitioning from VHDL to Verilog, Introduction to Cryptography Week 2: A5 Cipher Implementaion, Transitioning from Verilog to Verilog-A Week 3: Verilog-A Mixer Analysis.

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Solid State Storage (SSS) System Error Recovery

Solid State Storage (SSS) System Error Recovery. LHO 08. For NASA Langley Research Center. Background. NASA Langley Research Center is building a system to record streaming video and other data when the Space Shuttle docks with the Space Station.

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MY CAREER IN COMMUNICATION SYSTEMS (THE EARLY YEARS)

MY CAREER IN COMMUNICATION SYSTEMS (THE EARLY YEARS). SOLOMON W. GOLOMB (VITERBI PROFESSOR OF COMMUNICATIONS IN THE VITERBI SCHOOL OF ENGINEERING). CSSE TUESDAY, OCTOBER 24, 2006 AT USC. MY CAREER IN COMMUNICATION SYSTEMS (THE EARLY YEARS).

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Information Security

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Two Tantalizing Concepts

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State space convergence in the A5/1 keystream generator

State space convergence in the A5/1 keystream generator. Ali Al Hamdan and Harry Bartlett Information Security Institute / Faculty of Science and Technology, Queensland University of Technology. Background. A5/1 Keystream generator

235 views • 9 slides