Is Windows Live Messenger (MSN) secure?

I have been told that MSN is not as secure as Skype.
However, further details have not given.

Does anyone can explain that? I would like to understand the reason for this.
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Rich RumbleConnect With a Mentor Security SamuraiCommented:
Both are subject to warrants and possible attacks, or insiders. There was a trojan for skype released last year in august 09. Microsoft messenger has plenty of virus' roaming around, the communications are still subject to man-in-the-middle attacks and again insiders or microsoft themselves. I'd say that MSN is less secure because of the virus' me and my users recieve everyday. We do not use skype, I'm not sure how many problems are found when using it.
There are a lot more for msn.
You have to remember, there is no such thing as "Absolute Security". What you have to do is make sure you don't give away anything that would make things easier for an attacker to get you. From my experience they're both secure. I've used both Skype and Windows Live Messenger. And I can tell you there is not one chat application out there that is "TOTALLY" secure.
No such thing as full security. However, you can take the steps required to enable security to the extent required by you. Check out It is a universal chat client. You can use a plugin called OTR (off the record). You can visit the page from the pidgin site here (see the security and privacy plugins). There are many plugins under this section. Choose the one suited to your requirement.
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 it depends on how you define secure. everything in this world has a vulnerabilities. it will depends now often these vulnerabilities are found.

 and also, there are plenty of worms that would bypass the vulnerabilities by doing automated spam of viruses. there are no limit in security
Both send messages in cleartext meaning that anyone intercepting the traffic would be able to read all the messages and sent files.

There are solutions to secure communication using encryption.
Rich RumbleSecurity SamuraiCommented:
Incorrect, Skype is encrypted by default, and MSN Live Messenger can use encryption but is not by default.
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