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If I know someone's ip, mac addresses and a computer name in a local wifi network, and also that there is skype running on their computer (and port), can send them a message through skype? Can I find out their skype user name?

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closed as off-topic by NULLZ, TildalWave, Adi, Xander, schroeder Oct 2 '13 at 19:12

This question appears to be off-topic. The users who voted to close gave this specific reason:

  • "Questions asking us to break the security of a specific system for you are off-topic unless they demonstrate an understanding of the concepts involved and clearly identify a specific problem." – NULLZ, TildalWave, Adi, Xander, schroeder
If this question can be reworded to fit the rules in the help center, please edit the question.

Skype traffic travels through the Skype central servers. You cannot directly connect.

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I don't want to connect to it. – Alan Coromano Oct 3 '13 at 12:08
    
Then the answer is simple: you cannot find out a Skype username based on IP/mac/computername – schroeder Oct 3 '13 at 16:12

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