Net Worth...Am I Worth Anything?

I found it somewhat challenging to calculate my net worth. It's difficult to track down every single credit card whether its a visa/mastercard or just a credit card for shopping stores like Macy's and JCPenny's. The first place I started was my wallet, and from there I could gather a list of all cards I physically have. But then I went online to try and log in to these different credit cards and found it a pain to try and remember what login I had set up for each. Also, not everything I have credit for has an actual credit card that I keep in my wallet. The next place I looked was my back account to see what things I had auto payments set up for. I found a few lines of credit there that I went to their websites and logged in to check my balance. Probably my biggest debt would be the mortgage I have out on my house but that was pretty easy to figure out. I just logged into the website for the bank that gave me the mortgage. Overall though, I would say its pretty easy to gain access to all my information because it was all available online. But its kind of hard to get all the log in information correct. So if I have trouble getting logged in, wouldn't someone whose trying to steal or hack my account have a hard time?