help about Private keys on my btc wallet

[ali96.bit]

Help about extracting private keys of Electrum wallet
I use electrum portable version, which is installed, on my USB flash drive. I use it only at one secure laptop, which is offline always except times I want to transfer btc (let us call this laptop A). Now I have another laptop that never I connect it to net and I rarely use it (let us call this laptop B).

My question 1:
I want to put my USB on laptop B (offline always). Then extract my private keys and write them in a paper and delete any output file from laptop B. is this method safe?
I have heard to not export private keys for several times. I think the above method is safe. I want to know your idea about it. Is it safe to export private keys in a totally offline laptoap?


My question 2:
 As you know Electrum uses change address for security. As I know it generate different couple keys (public and private keys) which are made by main seed of electrum. I know that these adresse are connected to my seed. But I have a question: imagine I have a public address A and its correspondent private key AA. I know that I can import my public and private key in a second software like JaXX to sweep my btc in second wallet. My question is that if I import A and AA in second software like JAXX , it sweep btc from whole my electrum wallet or it sweep btc from my just address A.

[OmegaStarScream]

1. Why do you want to do this exactly? If it's for long term storage then you could simply create a paper wallet, print it and send all your funds to it but to answer your question, It should be safe yes.
2. I haven't used Jaxx before but there is a difference between sweep and import. Importing will basically take that private key/address and add it to your jaxx wallet while sweeping will send the funds from your Electrum (that specific private key only and not the whole wallet) to your Jaxx. If you imported the seed however, everything will be moved.

[HCP]

My question is that if I import A and AA in second software like JAXX , it sweep btc from whole my electrum wallet or it sweep btc from my just address A.

If you import only the private key AA, it can ONLY take the BTC that is controlled by that private key... so if you have 3 addresses (A, B & C) and 3 corresponding private keys (AA, BB & CC)... each with 0.1 BTC (total 0.3 BTC in wallet) and you import only AA to Jaxx... then Jaxx will only have access to 0.1 BTC from Address A.

Note that importing a private key DOES NOT remove that private key from your existing wallet... your current Electrum wallet would still show Addresses A, B & C with a Total Balance of 0.3.

However, as OmegaStarScream pointed out... if you "sweep" AA to Jaxx... then the 0.1 BTC would be removed from address A and put into a new address in Jaxx... Electrum would show this as a "send"... and you'd only have coins on Addresses B&C with a total balance of 0.2.