symmetric encipherment

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• Application security — encompasses measures taken throughout the life cycle to prevent exceptions in the security policy of an application or the underlying system (vulnerabilities) through flaws in the design, development, deployment, upgradation,or maintenance of the …   Wikipedia

• History of cryptography — The history of cryptography begins thousands of years ago. Until recent decades, it has been the story of what might be called classic cryptography that is, of methods of encryption that use pen and paper, or perhaps simple mechanical aids. In… …   Wikipedia

• Cipher — For other uses, see Cipher (disambiguation). Edward Larsson s rune cipher resembling that found on the Kensington Runestone. Also includes runically unrelated blackletter writing style and pigpen cipher. In cryptography, a cipher (or cypher) is… …   Wikipedia

• data encryption — Process of disguising information as ciphertext, or data that will be unintelligible to an unauthorized person. Decryption is the process of converting ciphertext back into its original format, sometimes called plaintext (see cryptography).… …   Universalium

• Block cipher modes of operation — This article is about cryptography. For method of operating , see modus operandi. In cryptography, modes of operation is the procedure of enabling the repeated and secure use of a block cipher under a single key.[1][2] A block cipher by itself… …   Wikipedia

• Enigma machine — Military Enigma machine …   Wikipedia

• Index of coincidence — In cryptography, coincidence counting is the technique (invented by William F. Friedman[1]) of putting two texts side by side and counting the number of times that identical letters appear in the same position in both texts. This count, either as …   Wikipedia

• Four-square cipher — The Four square cipher is a manual symmetric encryption technique. It was invented by famous French cryptographer Felix Delastelle.The technique encrypts pairs of letters ( digraphs ), and thus falls into a category of ciphers known as… …   Wikipedia

• per — per·acetic; per·acid; per·act; per·acute; per·alkaline; per·aluminous; per·am·bu·lant; per·am·bu·late; per·am·bu·la·tion; per·am·bu·la·tor; per·am·bu·la·to·ry; per·a·na·kan; per·bend; per·borate; per·bromide; Per·bu·nan; per·ca; per·cale;… …   English syllables

• su — acap·su·lar; al·lo·gnath·o·su·chus; an·su; at·su·ge·wi; au·su; au·su·bo; ba·bas·su; ba·su·ral; ba·su·to; be·su·go; bur·su·la; bus·su; cae·su·ra; cae·su·ral; cap·su·la; cap·su·lar; cap·su·late; cap·su·la·tion; cap·su·min; ca·su·al·ism;… …   English syllables