Not possible.

There are only few things you can do to make it harder for the people to find your internet trail.

You have an email? Change your info to some random info, save and then cancel it. Same goes for similar accounts.

You have an e-banking account? Demand your bank to disable this specific service for you.

MSN? Cancel it.

Facebook? Erase any trail left (for example pictures, notes, friends) and then cancel. DO NOT DE-ACTIVATE, CANCEL THRU HELP ME.

Skype? Cannot be canceled but you can alternate your real profile to a fake one.

Have a personal website? Cancel it via the hosting company.

Remember everything can be cached to search engines or web-servers or can be saved to local hard drives. Example, I posted my pic on facebook, some friend of mine saved it on his computer, nothing can be done about it.

That’s all you can do to protect yourself. And of course IP logs are out of the table.

Is it possible to hide my existence on internet? You’re pretty much asking if you can exist and same time not exist.

However there are ways to make it much harder for someone to identify you on the web. The keyword here is “proxies”.

Proxy is the middleman between you and the remote server. But (there’s always a but) the data being transfered “you > ISP > proxy > proxy’s ISP > target’s ISP > target (remote server you want to reach out)” and backwards, that means if someone has access to ISP’s logs and activity can track you easily, that’s probably CIA level clearance and same level agencies.

They say be close to your friends and closer to your enemies, wise dude who ever said that.

Everything should be analyzed from the inside. So if I had all these clearances I would do:

1) create a time-window of the attack.

2) check target’s activity logs to find out which server was used as a proxy. (Let’s say we have different 1000 connections in the logs)

3) examine these 1000 connections and cross-check them with their own activity logs and and the results should be cross-checked within the time-window.

4) You have the original IP unless it was a proxy too, however the activity logs are much more to check but its still traceable. Using the same technique above, at some point you will get the original IP.

Of course original IP may have nothing to do at all with the attack, if the attacker has hacked into a wi-fi network or bluetooth or it’s internet cafe or public wi-fi. Then the digging goes way more, routers should be seized and checked for the latest mac addresses, cell towers will need to triangulate cell phones who were at the area within the time window and much more. Probably none will dig so far unless it’s critical.

Keep in mind all the above can be processed within seconds.

Satellites can be used too to define who was where and did what. There’s no way to escape unless they let you to.

Some advices to hide your tracks easily.
Wanna hide your IP to some site? Can happen, use a http proxy, or some secure sock4 or sock5 or use Tor network.
Never ever attempt anything illegal because if they want to get you, they will get you, house always wins.

Everything said was for educational purposes and should NOT be used for illegal activities.