THE WHATIS.COM WORD-OF-THE-DAY August 11, 2003 cryptoperiod
________________ SPONSORED BY: Microsoft The Quick Guide to Windows Server 2003. Get the latest information on installation, new features and training. Click here! http://WhatIs.com/r/0,,16959,00.htm?microsoft ________________ TODAY'S WORD: cryptoperiod See our complete definition with hyperlinks at http://searchsecurity.techtarget.com/sDefinition/0,,sid14_gci518928,00.html A cryptoperiod (sometimes called a key lifetime or a validity period) is a specific time span during which a cryptographic key setting remains in effect. A key uses an algorithm to create ciphertext from plaintext (ordinary unencrypted text) and, for the receiver of the encrypted text, to decipher it. Once the crptoperiod ends, the key is no longer available for either encryption or decryption. The cryptoperiod is decided by weighing factors such as the sensitivity of the encrypted data, the risk of key compromise, and the cost of rekeying (encrypting the same material with a new key). Throughout the cryptoperiod, a key can be used to verify or decrypt data. The effective use of cryptoperiods is an important part of key management. A cryptoperiod is usually expressed as a span of calendar or clock time, but may also be expressed as a maximum volume of data to be encrypted by an algorithm for a particular key. The span of a cryptoperiod can be a number of decades where keys are needed for encrypted text that is archived. ______________________ RELATED TERMS: key http://searchsecurity.techtarget.com/sDefinition/0,,sid14_gci213695,00.html algorithm http://searchvb.techtarget.com/sDefinition/0,,sid8_gci211545,00.html ciphertext http://whatis.techtarget.com/definition/0,,sid9_gci213853,00.html plaintext http://searchsecurity.techtarget.com/sDefinition/0,,sid14_gci213596,00.html ______________________ SELECTED LINKS: SearchSecurity.com provides news and links to up-to-date information about cryptography. http://searchsecurity.techtarget.com/bestWebLinks/0,289521,sid14_tax281917,00.html ______________________ TODAY'S TECH NEWS: LINUX USERS LIKELY TO STAY COURSE AS IBM COUNTERSUES IBM this week reacted to SCO's move to offer licenses for its Linux code by filing a countersuit. The suit isn't likely to affect customers' use of the open-source software. http://search390.techtarget.com/originalContent/0,289142,sid10_gci918234,00.html FINAL VERSION OF OFFICE 2003 NEAR Office 2003, the newest version of Microsoft's suite of desktop applications, is nearly complete. The software is expected to be released to manufacturing Aug. 15. http://searchwin2000.techtarget.com/originalContent/0,289142,sid1_gci918240,00.html LINUXWORLD: USERS YAWN AT SCO'S LEGAL ACTION LinuxWorld Conference & Expo attendees ho-hum the SCO Group's legal battle against Linux. Advocate Bruce Perens, however, points out that SCO may have started an avalanche of patent suits. http://searchenterpriselinux.techtarget.com/originalContent/0,289142,sid39_gci918200,00.html >> Catch up on all the latest IT news at http://searchtechtarget.techtarget.com/ ______________________ Learning Path | Malware: Worms, viruses, and other malicious code Read our series of abbreviated definitions in sequence and be the malware Know-It-All at your office. http://searchsecurity.techtarget.com/sDefinition/0,,sid14_gci915380,00.html ______________________ Secret Word-of-the-Day | What is it? HINT: This is the name for a computer program that captures, displays, and manipulates rows and columns of data. >> Think you know the Secret Word-of-the-Day? See if you're right! http://searchwin2000.techtarget.com/sDefinition/0,,sid1_gci532933,00.html _____________________ Quiz #11 | Artificial Intelligence How much do you know about AI? Take this week's quiz and find out! >> Click to take the quiz http://searchcrm.techtarget.com/sDefinition/0,,sid11_gci789222,00.html ______________________________ RECENT ADDITIONS AND UPDATES [1] dark energy http://whatis.techtarget.com/definition/0,,sid9_gci917929,00.html [2] strawman http://searchcrm.techtarget.com/sDefinition/0,,sid11_gci840566,00.html [3] qubit http://whatis.techtarget.com/definition/0,,sid9_gci341232,00.html [4] flash mob http://whatis.techtarget.com/definition/0,,sid9_gci916705,00.html [5] IT Crossword Puzzle: Malware http://searchsecurity.techtarget.com/sDefinition/0,,sid14_gci916579,00.html ____________________________________________________________________ ::::::::::::::::::: WHATIS.COM CONTACTS ::::::::::::::::::: LOWELL THING, Site Editor ([EMAIL PROTECTED]) ____________________________________________________________________ MARGARET ROUSE, Associate Editor ([EMAIL PROTECTED]) ::::::::::::::::::::: ABOUT THIS NEWSLETTER :::::::::::::::::::::: This newsletter is published by TechTarget, the most targeted IT media. http://www.techtarget.com Copyright 2003 TechTarget. 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