WhatsApp Messenger is available for iOS, BlackBerry OS, Android, Symbian and Windows Phone only. WhatsApp synchronizes with the phone's contact's book, so users do not need to add contacts in a separate book. As the underlying technology the application uses the open standard XMPP.
Android, Windows Phone, Blackberry, Symbian and Nokia S40 users can use the app 1 year for free, whereafter they have to pay US$1.99 (or local equivalent) per year. iPhone users can buy the app for a one-off fee of US$0.99 (or local equivalent) although the app is occasionally free for limited periods
In May 2011 there was a security hole reported in WhatsApp which left user accounts open for hijacking.Communications made by current WhatsApp versions are not encrypted, and data is sent and received in plaintext, meaning messages can easily be read if packet traces are available.
In September 2011 a new version of the WhatsApp Messenger application for iPhones was released. In this new version, the developer has closed a number of critical security holes that allowed forged messages to be sent and messages from any WhatsApp user to be read.
On January 6th 2012 an unknown hacker published a website (WhatsAppStatus.net) which made it possible to change the status of an arbitrary whatsapp user, as long as the phone number was known. To let it work it only required a restart of the app. According to the hacker it is only one of the many security issues in Whatsapp. On the 9th of January Whatsapp reported to have implemented a final solution. In reality the only measure that was taken was blocking the website's IP-address. As a reaction a Windows tool was made available for download providing the same functionality. This issue has not been resolved until now. The first notification of this issue has been reported to Whatsapp in September 2011.
On January 13th, 2012, Whatsapp was pulled from the iOS App Store. The reason was undisclosed, but most probably related to the security holes. The company replied saying that they submitted a new version and are awaiting publication to iTunes.
- eBuddy XMS
- Google Talk (bundled with Android)
- Kik Messenger
- BlackBerry Messenger (bundled with Blackberry)
- iMessage (bundled with iOS)
- ^ Beam, Brian. "WhatsApp Messenger Review (iPhone version)". Macworld. http://www.macworld.com/appguide/app.html?id=89525&expand=false. Retrieved June 12, 2011.
- ^ Blackberry App World Download Link
- ^ WhatsApp for Android
- ^ WhatsApp for Nokia
- ^ WhatsApp for Windows Phone
- ^ "WhatsApp? Nicht ohne Risiken. [WhatsApp? Not without risks.]". http://translate.google.com/translate?hl=de&sl=de&tl=en&u=http%3A%2F%2Fshakal.blog.de%2F2011%2F03%2F22%2Fwhatsapp-risiken-10872342%2F. (translated from German at )
- ^ WhatsApp price history
- ^ McCarty, Brad (May 23, 2011). "Signup goof leaves WhatsApp users open to account hijacking". The Next Web. http://thenextweb.com/apps/2011/05/23/signup-goof-leaves-whatsapp-users-open-to-account-hijacking/. Retrieved June 12, 2011.
- ^ Brookehoven, Corey (May 19, 2011). "Whatsapp leaks usernames, telephone numbers and messages". youdailymac.net. http://www.yourdailymac.net/2011/05/whatsapp-leaks-usernames-telephone-numbers-and-messages/. Retrieved July 18, 2011.
- ^ Kurtz, Andreas (September 8, 2011). "Shooting the Messenger". http://www.andreas-kurtz.de/2011/09/shooting-messenger.html. Retrieved September 11, 2011.
- ^ Schellevis, Joost (January 12, 2012). "Second news item concerning the whatsapp status issue on the dutch website "Tweakers".". http://tweakers.net/nieuws/79321/whatsapp-status-van-anderen-is-nog-steeds-te-wijzigen.html. Retrieved January 12, 2012.
- ^ "Windows tool to change any Whatsapp status". January 12, 2012. http://WhatsAppStatus.net/. Retrieved January 12, 2012.
- ^ http://www.technobuffalo.com/software/applications/whatsapp-quietly-pulled-from-ios-appstore/
สามารถดาวน์โหลด WhatsApp ได้ที่ www.whatsapp.com
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