(edit) Regardless of whether this was copied, over-inspired or independently conceived (but let's be realistic here), the generally accepted rule of the game is that the first to the finish line gets to keep the logo. I don't make my living with logo design, but I did kill a week of sketching, refining and re-balancing on this one and I do happen to like it a lot. For what it's worth, I wrote a P2P VPN system in the past (called Hamachi) and I am involved in p2p and crypto domains in general. So I expect you to extend some professional courtesy, change the logo and close this matter in an amicable matter.
http://dribbble.com/shots/479881-Secure-Chat
http://logopond.com/gallery/detail/165288
https://www.google.ca/search?q=secure+chat+logo - first page hit too
Not cool at all, "cool guys around the world".
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(edit) Regardless of whether this was copied, over-inspired or independently conceived (but let's be realistic here), the generally accepted rule of the game is that the first to the finish line gets to keep the logo. I don't make my living with logo design, but I did kill a week of sketching, refining and re-balancing on this one and I do happen to like it a lot. For what it's worth, I wrote a P2P VPN system in the past (called Hamachi) and I am involved in p2p and crypto domains in general. So I expect you to extend some professional courtesy, change the logo and close this matter in an amicable matter.