What an annoying situation if you need that document when you've been relizing that the document has been lost. That's why I always make a copy of each important document and save it in one of my private email at the internet. Before I save it in my account, I always ensure the security aspect by encrypting it using an encription tool. You can use winzip or winrar password feature as well. Don't forget to save your encription tool in your email account. It will be used to decrypt your important document.
These tips would usefull whilw your passport was lost in a trip in other country. You just need to find the nearest internet facility and download your copy of passport from your email account. After that, you should report your passport to Indonesian embassy in that country. Hence, you don't need to be panic if your documents get lost.
