An algorithm that turns a variable-sized amount of text into a fixed-sized output (hash value). Hash functions are used in creating digital signatures, hash tables and short condensations of text for analysis purposes (see hash buster). Hash functions are also known as "cryptographic hash functions." See hash table and one-way hash function.
 | Reproduced with permission from Computer Desktop Encyclopedia. Copyright (c) 1981-2008 The Computer Language Company Inc. All rights reserved. |
Additional Resources
- Apple Confuses Speech with a DMCA Violation
- Apple recently sent a "cease and desist" email to bluwiki demanding the removal of postings by users who are trying to figure out how to write software that can sync media to the latest versions of the iPhone and iPod touch. According to the EFF: Apple doesn't...
- Blog posts 2008-12-02
- Survey: CIOs 'out of the loop'
- CIOs are often seen as "glorified IT directors", looking after the day-to-day running of IT systems, instead of being used to align IT with business aims. Chief information officers are "out of the loop", according to a survey carried out by London-based Deloitte and the Cranfield School of Management....
- News items 2008-12-01
- Is there no end to the AutoRun madness?
- * Ryan Naraine is traveling. Guest editorial by Roel Schouwenberg Let's skip any introduction and get straight to the point: We're currently facing a problem of epidemic proportions in malware that is spreading via removable devices. The U.S. army's recent...
- Blog posts 2008-12-01
- Distributed and Parallel Database Systems
- The maturation of Database Management System DBMS technology has coincided with significant developments in distributed computing and parallel processing technologies. The end result is the emergence of distributed database management systems and parallel database management systems. These systems have started to become the dominant data management tools for highly data-intensive...
- White papers 2008-12-01
- Holiday Gift Guide 2008: Portable digital video players
- A couple days ago I posted my Holiday Guide for MP3/audio players and a couple of commenters asked where ARCHOS and Cowon were on the list. I tried to stay focused on audio focused devices in that guide, although many digital media players today can play both audio and video....
- Blog posts 2008-11-29
- Icahn: 'I like Jerry'; Yahoo needs Microsoft search deal
- Carl Icahn says he likes Jerry Yang and notes the former Yahoo CEO is a "charismatic guy," but Yahoo needs to do a Microsoft search deal since the company can't afford to fight Google. Icahn's remarks, made in an interview with Barron's subscription required a few days...
- Blog posts 2008-11-29
- Is Apple pricing itself out of education?
- Fellow blogger, Robin Harris, wrote an interesting piece on the costly touches to the new MacBooks (design process, LED backlighting, etc.). Steve's history of putting form before function - or price - comes at a particularly bad time. The worldwide economic crunch - heckuva job, Greenspan! -...
- Blog posts 2008-11-25
- Apple's new Macbooks: flop or fiasco?
- The news that Apple has cut Macbook production by 20-30% may not be surprising given the world economy. But when HP reports that their Q3 notebook revenue grew 26% and Mac resellers are offering rebates on the new 'books things have gone very wrong in Cupertino. Looking,...
- Blog posts 2008-11-24
- The case for Scala
- Programming languages are like screwdrivers for developers. One size does not fit all, so good programmers keep several in their tool belt. The problem is, new languages are coming out all the time and you've only got so much room on your belt and in your schedule to learn them....
- Blog posts 2008-11-24
- Web 2.0 security? What a mash
- * Ryan Naraine is away on vacation. Guest editorial by Guillaume Lovet Ah, Web 2.0. Its endless composition of heterogeneous sources (aka "mash-up") possibilities, its social networking-oriented nature, its user-provided content... A Web adapted to today's powerful machines, linking people together in world...
- Blog posts 2008-11-24
- Netbooks + Ubuntu: On fence about form factor; OS solid
- Last week, I bought a Dell Mini 9 preloaded with Ubuntu. The idea: Check out a netbook and take Ubuntu for a spin. The early reaction: Netbooks can be handy, but they can also cramp your hands with those dinky keyboards. And aside from some early problems with connecting to...
- Blog posts 2008-11-24
- Advantages of the iPhone over the Storm
- You've probably heard enough about the Blackberry Storm, but humor me for a second. There are a number of ways that the Storm beats the iPhone because of what I call the second mover advantage. RIM deftly did what any wise competitor would do, they exploited the demand for features...
- Blog posts 2008-11-21
- Teaming Up to Crack Innovation and Enterprise Integration
- There is a thought provoking piece in the November issue of the Harvard Business Review written by James I. Cash, Jr., Michael J. Earl, and Robert Morison. Morison is an executive vice president and director of research at nGenera Corporation, while Earl and Cash are...
- Blog posts 2008-11-21
- Hands On: The BlackBerry Storm
- First off, a warning: Be very skeptical of any review you read in the next 24 to 48 hours that proclaims to be the definitive word on the Blackberry Storm. While clearly I have my own early impressions, the Storm is so different than any other smartphone...
- Blog posts 2008-11-19
- Giddyap - Oracle Mid-market apps team with Wells Fargo
- A Treasury Solution to Save Money not cost more of it I got a briefing from Oracle's Tony Kender and Wells Fargo's Brad Stewart concerning their new joint plug-in adapter product for Oracle's E-Business Suite. Basically, this adapter allows users of Oracle's mid-market applications to directly...
- Blog posts 2008-11-19
- iPhone vs. Android development: Day 2
- Welcome to day 2 of a 5-day course on iPhone programming presented by Joe Conway from Big Nerd Ranch. During the course I'll be blogging about the differences between Android and iPhone development. [Read: Day 1, Day 2, Day 3, Day 4, Day 5] ...
- Blog posts 2008-11-18
- Copy and paste on the Blackberry Storm
- In this video (00:50) you'll see how the copy and paste function works on the new Blackberry Storm smartphone from RIM and Verizon Wireless. It works like this: select a range of text with two fingers, press the Blackberry menu key, select copy, then launch the destination...
- Blog posts 2008-11-18
- Greening the data center
- Rising costs of energy - along with limited availability of energy in some areas – are forcing the IT industry to take a new approach in designing and managing data centers, says IBM's Christopher O'Connor. Commentary--Energy efficiency is a significant global issue today, and is expected to be even...
- News items 2008-11-17
- Should RIM also license Exchange ActiveSync?
- I was pretty impressed by the RIM BlackBerry Bold see my first impressions post and the display and keyboard sold me on it. I still think the display and keyboard are both fantastic and it is definitely the best BlackBerry device to date. However, due to the lack of Exchange...
- Blog posts 2008-11-15
- A rocket to see through the northern lights?
- The northern lights are beautiful when you see them from the ground. But they can be dangerous for your life if you're in a plane crossing an area where they are active. This is because your plane can lose radio contact for a long time when flying above the northern...
- Blog posts 2008-11-13
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