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Hello I have a problem.

I have two computers, one of them is airgapped

I have downloaded and runned Myetherwallet locally on an airgapped computer.

On the other computer I made the on line transaction

But here comes the problem:

I have written both the addresses to wich to send the coins from and to on the pc connected to internet

You know that when you run MEW LOCALLY you have to write an on line form and an offline form and then put the signed transaction into the on line form

The problem is that a potencial attacker could have those things recorded on my internet computer:

1) the address which I am sending the coins FROM

2) the address which I am sending the coins TO

3) the signed transaction made from that two addresses.

With all those informations is it possible to recover the Private key whith some kind of tools? comment

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No. The only way they could get your private key is if they got your private key. It can't be reconstructed from signed transactions or addresses.

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  • Are you sure? Even if I have used another address? I will explain: After I have sent the tokens to this address, I have made another transaction using one address previously used + another address (a new one) using another private key (on the airgapped computer). But the combo new address + signed transaction + previous address + old signed transaction are still on my internet PC... I would like to know if there is a remote way to exploit some kind of pattern , comparing the two signed transactions with the 3 addresses used to recover the one key..
    – luchins
    May 21, 2018 at 1:51
  • Basically I have 2 private keys. Once I made a transaction using the first private key to send the coins to the second private key's address and the combo (addresess +signed transaction was recorded on the internet PC). Then I made a second transaction from the second private key's address to another ethereum address, completly new. In this case was also recorded on my internet PC the combo (second private key's address + new signed transaction + new address to send the coins TO). Well with all those information can an attackker build a pattern for decryption?
    – luchins
    May 21, 2018 at 2:04
  • No. Again, the signed transaction is signed by your private key. it doesn't not contain your private key, nor can it be "unsigned" in order to derive your private key. If it were possible to obtain a private key from a signature, all cryptography (not just your Ethereum account) would be hopelessly broken and everything would be insecure and someone would remotely press the button that control all the nukes in the world and we would die.
    – tayvano
    Jul 26, 2018 at 10:36

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