YAHOO! MESSENGER

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'Yahoo! Messenger' is a popular advertisement-supported instant messaging client and associated protocol provided by Yahoo!. Yahoo! Messenger is provided free of charge and can be downloaded and used with a generic "Yahoo! ID" which also allows access to other Yahoo! services, such as Yahoo! Mail, where users can be automatically notified when they receive new email. Yahoo! also offers PC-PC, PC-Phone and Phone-to-PC service, file transfers, webcam hosting, text messaging service, and chat rooms in various categories.
In addition to instant messaging features similar to those offered by ICQ, it also offers (on Microsoft Windows) features such as: 'IMVironments' (customizing the look of Instant Message windows, some of which include authorized themes of famous cartoons such as Garfield or Dilbert), address-book integration and 'Custom Status Messages'. It was also the first major IM client to feature 'BUZZing' and music-status. Another recently added feature is customized avatars.
Yahoo! Messenger 2.5.3 for Mac, released in 2003, is the current stable version for Mac OS X. It has far fewer features than the current Windows release and has been reported to be quite buggy. In June of 2006 'Messenger for Mac 3.0b1' was released as a beta, and remains in beta more than a year later. This beta has a more modern interface than 2.5.3 and includes avatars,display image viewing, BUZZ facility, and some other features comparable to those on the Windows version. However, it is still lacking the more advanced features contained in the Windows version, such as PC-to-PC calling, photo sharing, an address book and chat room access. The latest beta version (rc4 released in May 2007) also contains bugs, including a java bug when Safari 3 is installed that causes new messages to pop to the top of the window causing the user to repeatedly scroll to the bottom of the window as new messages arrive.
Yahoo! has announced a partnership with Microsoft to join their instant messaging networks. This would make Yahoo! Messenger compatible with Microsoft's .NET Messenger Service. It also made Microsoft's Windows Live Messenger compatible with Yahoo!'s Network. This change has taken effect as of July 13, 2006, - Yahoo! Messenger has integrated instant messaging with Windows Live Messenger users, and is fully functional.
British Telecommunications' BT Communicator software is based on Yahoo! Messenger. BT Communicator was withdrawn on 31st December 2006. [1]
Yahoo! Messenger was originally launched under the name Yahoo! Pager on March 9, 1998.

Contents
Features
Yahoo! Voice
Voicemail and file sharing
Plug-ins
Yahoo! Mail integration
URI scheme
Offline Messaging
Games
yahoomessenger.exe (previously ypager.exe)
Upcoming releases
Latest releases
Feature & release history
Windows
Mac
Malware
Compatible software
References
See also
External links

Features


Yahoo! Voice

Main articles: Yahoo! Voice

'Yahoo! Voice' is a Voice over IP PC-PC, PC-Phone and Phone-to-PC service [2], [3] provided by Yahoo! via its Yahoo! Messenger instant messaging application.
Voicemail and file sharing

Yahoo! added voicemail and file sending capabilities to their client. File-sharing of sizes up to 1GB was added.
Plug-ins

As of 8.0, Yahoo! Messenger has added the ability for users to create plug-ins (via the use of the freely available Yahoo! Messenger Plug-in SDK), which are then hosted and showcased on the Yahoo! Plug-in gallery.
Yahoo! Mail integration

On July 2, 2007, Yahoo! plans to integrate Yahoo! Mail Beta and Yahoo! Messenger [1]. Conversations will eventually be archived and stored in the same manner as emails. This allows users to search within their chat logs easily, and to have them centrally stored no matter what computer is used to have conversations.
URI scheme

Yahoo! Messenger's installation process automatically installs an extra URI scheme ("protocol") handler into some web browsers, so that URIs beginning "ymsgr:" can open a new Yahoo! Messenger window with specified parameters. This is similar in function to the mailto: URI scheme, which creates a new e-mail message using the system's default mail program. For instance, a web page might include a link like the following in its HTML source to open a window for sending a message to the YIM user ''notarealuser'':
<a href="'ymsgr:sendim?notarealuser'">Send Message</a>
To specify a message body, the m parameter is used, so that the link location might look like this:
ymsgr:sendim?notarealuser&m=This+is+my+message
Offline Messaging

Offline messaging, a feature long offered by Yahoo!, allows online users to send messages to their contacts, even if said contacts are not signed in at the time. The sender's offline contacts will receive these messages when they next go online.
===Interoperability with Windows Live Messenger===
On October 13, 2005, Yahoo! and Microsoft announced plans to introduce interoperability between their two messengers, creating the second largest instant messenger userbase worldwide: 40 percent of all users (AIM currently holds 56 percent). The announcement comes after years of 3rd party interoperability success (most notably, Trillian, Pidgin) and criticisms that the major instant messengers were locking their networks. Microsoft has also had talks with AOL in an attempt to introduce further interoperability, but so far, AOL seems unwilling to participate.
Interoperability between Yahoo! and Windows Live Messenger was launched July 12, 2006. This allows, for Yahoo! and Windows Live Messenger users to chat to each other without the need to create an account on the other service, provided both contacts use the latest versions of the clients. For now, it's impossible to talk using the voice service among both messengers.
Games

There are various games and applications available that can be accessed via the conversation window by clicking the games icon and challenging your current contact.
yahoomessenger.exe (previously ypager.exe)

yahoomessenger.exe is the main process belonging to the Yahoo! Instant Messenger application, an Internet messaging program. The name of the Yahoo! instance messaging client changed from ypager.exe to yahoomessenger.exe since version 7.5.0 beta.
'Note that this applies to the Windows version of Yahoo! Messenger.'

Upcoming releases


Yahoo! will soon unveil a completely re-hauled [4] version for Windows Vista to a generally enthusiastic response [5]. It has been designed to exploit the new design elements of Vista's Windows Presentation Foundation.
The Mac OSX client version 3.0 Beta 2 will reportedly have more features, including Voice [6], and a better connection with the most recent versions of OSX However, Yahoo! have yet to announce a release date for this beta.

Latest releases


A screenshot of Yahoo! Messenger 3.0b1 for Mac OS X


★ 'Windows' - 8.1.0.419 / August 29, 2007

★ 'Mac OS X' - 3.0b2 / September 06, 2007


★ Several third-party clients exist that can connect to the Yahoo! Messenger network, such as, Fire, Adium and Proteus. Adium can access the chat rooms, the others cannot - they are for instant messaging only. Given Yahoo!'s apparent lack of interest in updating Messenger for Macintosh, many of these third-party clients actually have more features and are less buggy than Yahoo!'s product.

★ 'Unix' - 1.0.4 / September 2003


★ The Unix version looks different from the Windows version.


★ Version 1.0.6.1 is available for Gentoo Linux (masked as ~x86).


★ Anybody can download version 1.0.6 from the Unix Beta page: http://public.yahoo.com/~mmk/


★ Feature-rich open source Linux clients are available for Yahoo! Messenger such as Pidgin and gyach.

★ 'BlackBerry' - Research In Motion and Yahoo! offer a free Yahoo! Messenger client for modern BlackBerry devices. Note that this is not supported on the Cingular network.

Feature & release history


Windows

There are many versions between those listed here and prior to last version listed here. These are "major releases". See one of several sites listed in external links to find other, older versions of the product.

★ 1.0 March 9, 1998

★ 3.0 August 17, 2000

★ 7.0.0.426 — August 8, 2005


★ Renamed to "Yahoo! Messenger with Voice"


★ Drag-and-drop photo sharing


★ Drag-and-drop file sharing


★ PC-to-PC calling


Voicemail


Ringtones


Yahoo! 360° integration


★ Pop-up Contact Cards


Spam Reporting


★ New tabs


★ New emoticons


★ Archive updates


★ LiveWords (Beta)

★ 7.0.0.437 — August 30, 2005

★ 8.0.0.505 — June 20, 2006


★ Plugins possible

★ 8.0.0.508 — July 13, 2006


★ Interoperability between Yahoo! and Windows Live Messenger contacts

★ 8.0.0.701 — August 10, 2006


★ The release date signifies the release of a beta version. This is not clearly documented on the Yahoo site.

★ 8.0.0.716 — September 29, 2006


★ No Information Available

★ 8.1.0.195 — October 25, 2006


★ Renamed to "Yahoo! Messenger"


★ Ability to check for updates from the help menu

★ 8.1.0.209 — December 4, 2006


Patched an ActiveX Control Buffer Overflow

★ 8.1.0.239 — January 19, 2007


★ Improvements in voice quality and sign-in, fixes for minor bugs with Windows Vista

★ 8.1.0.244 - March 14, 2007

★ 8.1.0.249 - March 28, 2007


★ Patches a security flaw

★ 8.1.0.401 - June 8, 2007


★ Fixes a vulnerability with the Webcam ActiveX control

★ 8.1.0.402 - June 15, 2007


★ Fixes a buffer overflow in an ActiveX control

★ 8.1.0.413 - July 17, 2007


★ Unknown

★ 8.1.0.416 - August 22, 2007


★ Unknown

★ 8.1.0.419 - August 29, 2007


★ Unknown
Mac


★ 2.5.3 - September 24, 2003


★ Chat


Webcam


★ Conference chat

★ 3.0 beta 1 - June 28, 2006


★ New UI


★ Display Images


★ Avatars Support


★ Stealth Settings


★ Interoperability between Yahoo! and Windows Live Messenger contacts

★ Prior Releases - Undocumented

★ 3.0 beta 2 [7] - September 06, 2007


★ Tabbed IM windows


★ Chat rooms


★ Improved stability for webcam and file transfer


★ More emoticons


★ Message archiving


★ No voice calling

Malware


Yahoo! Messenger (along with other networks such as Windows Live Messenger and AOL Instant Messenger) is often used as a conduit or "vector" for delivering malicious software such as spyware, viruses, worms, and trojans to unsuspecting computer users. The two methods used by hackers to deliver malware over the IM vector are (1) sending a file transfer with a virus-infected file, and (2) delivering a message with socially engineered content containing a web address (URL) containing active malicious code. Viruses and worms with colorful names such as W32.Yalove or W32/Spybot-MQ have been identified as targeting users of the Yahoo! Messenger network over the past few years.
The threat of infection by these two methods is substantial and growing. The IM Security Center, a collaboration between security companies and corporations, has tracked attacks over IM since 2003 and shows well over 1000 distinct attacks over the public IM networks. The first half of 2007 saw an 84% increase in IM attacks over the first half of 2006. While IM-specific attacks remain a small percentage of overall virus and malware threats, the continued growth in usage of IM, along with the rapid adoption of IM in the workplace (See Instant Messaging) make IM an attractive vector for hackers, and both individuals and companies must take precautions to avoid infection.
The most common method of delivering a malicious payload is the use of social engineering to construct a message that appears to be coming from a contact on the recipient's contact list. A socially engineered message is one that is written in a friendly, informal manner, that could easily be mistaken as coming from a friend. The message usually will say something like "Click here to see pics of me from vacation!" or "Is this you?" with a web address -- known as a "poison URL" -- for the recipient to click. Upon clicking the web address, the recipient is connected to a website containing active content, which is immediately downloaded to the recipient's computer. In most cases, the payload contains an installer, a number of hidden files containing text, and code which causes the same socially engineered message with poison URL to be sent to every contact on the contact list. When the message is sent to all contacts, the cycle starts again, as each contact believes they are receiving a message from a trusted friend. In this manner, IM-borne malware is capable of propagating very rapidly through company and external networks.
Worms and viruses are discovered on a regular basis by security companies, particularly by the three companies with IM-specific security products, Akonix Systems, FaceTime Communications, and Symantec. According to IM security researchers at Akonix, the number of new threats identified each month is 30 to 35, with a high of 88 in October, 2006.

Compatible software



Adium

Agile Messenger

★ Akonix L7 Enterprise (for security and archiving of Yahoo! Messenger in corporate use)

BitlBee

Centericq

Fire

IM2

imeem

IM+ Messenger

IMVU

Instan-t

Jabberwocky

Kopete

MECA Messenger

meebo

Meetro

Miranda IM

OctroTalk

Paltalk

Pidgin (formerly Gaim)

Proteus

Qnext

SIM

Trillian

Trillian Pro

Trillian Astra

Windows Live Messenger

References


1. http://www.bt.com/btcommunicator
2. Yahoo! Delivers Phone Out and Phone In Voice Services in the U.S.
3. Yahoo's 'Voice Over IM' Targets Skype
4. http://messenger.yahoo.com/windowsvista.php
5. http://www.techcrunch.com/2007/01/07/yahoo-peels-the-curtain-on-ces/
6. http://arstechnica.com/journals/apple.ars/2007/1/11/6588
7. http://blog.messenger.yahoo.com/blog/2007/09/06/new-mac-version-beta-2/

See also



Comparison of instant messaging clients

Comparison of instant messaging protocols

Comparison of IRC clients

Instant Messaging

External links



Yahoo! Messenger

Yahoo! Messenger For the Web Beta

Yahoo! Messenger Blog

Yahoo! Messenger Plug-ins

Yahoo! Messenger SDK/Developer Network

WackyB Instant Messenger ramblings (Yahoo Pages)

Current Yahoo! Messenger Versions

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