CONTENTS   SEARCH   HISTORY   HELP

Textblocks Index Cards Link Base   C4UICT-companiesInternet-policiesNGOs-and-governmental-organizationsPR-and-advertisingart-theoryartificial intelligenceartificial intelligence & expert systemsbio-tech convergencebio-tech convergencebiometricscensorshipcivil-rightscivil-societycommercial contentcomplexityconspiracycopyrightcosmic visionscovert-actioncryptographycultural-diversitycultural-jammingcultural-memorycultural-practicecultural-theorycyber-politicscyberpoliticsdata industrydata miningdata warehousingdatabasedevelopmentdigital art-workdigital workersdigital-culturedigital-networksdirect marketingdirekt marketingdisinformationechelonechelon technologyelectronic espionageelectronic-mediaelectronic-securityelectronic-surveillanceenfopolface-recognitionfilters & ratingfilters and ratingfinance-and-economyforeign policyfreedom of expressionfreedom-of-informationfuzzy logicgender-issuesglobal playersglobalizationgovernmenthistoryhistory of computinghistory of the internethuman-rightsindependent contentinformationinformation povertyinformation securityinformation societyinformation warfareinformation-infrastructureintelligenceintelligence agencyintelligence-agenciesinternational commercelaw enforcementlegal-informationmachine-slavesmanipulationmedia artmedia concentrationmilitary technologynational securitynew-workplacenon-lethal-weaponsoutsourcingparallel culturepolitical economy of the Internetprivacyprivacyprivatisationpropagandapsychopoliticspublic spacepublic-accesspublic-domainroboticssatellitesocial-changespace policyspace-technologystandardizationsteganographysupranational-organizationssurveillancetechnological developmentterrorismtheory of technologythink-tankstimelinetransportationuser trackingwar Use <ctrl> or <shift> on your keyboard for multiple selections.

WORLD-INFOSTRUCTURE > CRYPTOGRAPHY > SOME ESSENTIAL DEFINITIONS

some essential definitions some essential definitions in the field of cryptography are: - cryptoanalysis - cryptology - ciphers "Few false ideas have more firmly gripped the minds of so many intelligent men than the one that, if they just tried, they could invent a cipher that no one could break." (David Kahn) codes plaintext ciphertext to encipher/encode to decipher/decode The variants of encryption systems are endless. For deciphering there exists always the same game of trial and error (first guessing the encryption method, then the code). A help to do so is pruning. Once, after a more or less long or short period a code/cipher breaks. Monoalphabetic ciphers can be broken easily and of course are no longer used today but for games. for further information on codes and ciphers etc. see: http://www.optonline.com/comptons/ceo/01004A.html http://www.ridex.co.uk/cryptology/#_Toc439908851 browse Report: Cryptography     Abstract  ... -3   Timeline 1970-2000 AD -2   Cryptography's Terms and background -1   So what does cryptography mean? 0   some essential definitions +1   Key-Systems +2   Asymmetric or Public-Key-Cryptosystems +3   Steganography      ... Epilogue  INDEX CARD     RESEARCH MATRIX  Vacuum tube The first half of the 20th century was the era of the vacuum tube in electronics. This variety of electron tube permitted the development of radio broadcasting, long-distance telephony, television, and the first electronic digital computers. These early electronic computers were, in fact, the largest vacuum-tube systems ever built. Perhaps the best-known representative is the ENIAC (Electronic Numerical Integrator and Computer, completed in 1946).