Quote from: BrewMaster on March 19, 2017, 04:53:31 PM

- Electrum wasn't created yesterday, it has been around for a couple of years.
- it is open source so you either have to know programming (python mostly) and go through the code and compile it yourself. or trust others who have done it.
- also you can trust many other users who are using the wallet to report in case one of them lost anything because of what you assume.

Quote from: Vito Corleone on March 19, 2017, 04:53:28 PM

When users enters private key it must to be send to bitcoin blockchain servers in encrypted format, how i can be sure no one can see them?

i think you are having trouble with the basics of bitcoin.
what you send to the "blockchain servers" which is called a node is your public key and that is safe because there is no way of finding private key from public key.

It can be used for 100 years... I want know myself how private keys transfered? Do they transfered in ecnrypted format? Do no one can intercept while private keys sending to servers?