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FILE TRANSFER PROBLEM IN IP MESSENGER HOW TO
Thomas Porter, Michael Gough, in How to Cheat at VoIP Security, 2007 IM Clients You can also educate users on the dangers of instant messaging in an attempt to help prevent social engineering attacks. You can educate users not to click links in e-mail messages. Finally, end-user education is essential. You can use these to scan transferred files for malicious content. Certain antivirus applications also have plug-ins for IM clients. Second, you should enable the file transfer protection settings in the IM client. The key is usually exchanged the first time communication occurs. IM encryption applications generally require the use of a shared key. This will help protect against network sneaking. You can use an add-on application to encrypt the content of your IM messages. If preventing the use of external IM systems is not feasible, then you should do what you can to protect the users and client systems. If you need IM within your organization, you can set up an internal IM system. You can block users within your network from accessing this central authentication server. Most public e-mail clients require users to log into a central authentication system.
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First, you can prevent the usage of external IM clients. There are several steps that can be taken to secure instant messenger usage. If you send confidential information through an instant message, you need to be aware that you could be sending it to anyone. You must still remember that you do not really know who is on the other side of the connection. Because of their relaxed and informal nature, IM systems often give people a false sense of familiarity and trust. Social engineering attacks are also common with instant messaging systems. It’s up to the users to use their best judgment. IM clients do not scan messages to see if these files are malicious or not, by default. Sometimes, these files are malicious executables. Usually, these are just pictures or something harmless. IM clients may warn you about clicking links in messages, but they will not block them. Many e-mail systems can scan messages for dangerous links, but IM generally does not do this. The links you receive could direct you to malicious sites. IM systems allow you to post Internet links inside of messages. You have to be very careful with IM systems because you never really know who is on the other end.
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If someone is sending sensitive information via IM, that information is vulnerable to network sniffing. There are programs available that can be used to encrypt IM traffic, but these are usually separate add-ons. Information sent via IM is generally sent in clear text. With IM, you have to worry about information flowing in clear text, Internet links in messages, file transfers, and social engineering. But along with the convenience and ease of IM come many potential threats. If you use an externally administered system, then you don’t have to worry about managing the infrastructure. It allows immediate and convenient communication between two parties. Instant messaging (IM) systems can be very useful.
FILE TRANSFER PROBLEM IN IP MESSENGER WINDOWS
Derrick Rountree, in Security for Microsoft Windows System Administrators, 2011 Instant Messaging