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I've installed bitcoin core a few months ago, and I'm 100% sure that I've never set any passphrase. Today I've got my first bitcoins, but when I've tried to send them it asked for a passphrase.
Is there some default passphrase that gets set when I install bitcoin core, or maybe I've been hacked? Anyone else had this problem?
Is there some default passphrase that gets set when I install bitcoin core, or maybe I've been hacked? Anyone else had this problem?
You should know it. I'm hoping you did not set a passphrase and forget it. This is from Armory wallet but it I think is true with core aswesll:
Your passphrase is the encryption key for your wallet, and thus you are in the same shoes as a potential attacker if you forget it — it will be nearly impossible to recover the wallet unless you can remember substantial portions of the passphrase. The more you can remember, the more likely you will be able to recover it. However, in nearly all cases, you will need to hire someone with knowledge of encryption and who has access to a lot of computing power. For reference, if you use a completely random 6-character passphrase for your wallet, and you cannot remember anything about it, it will take your computer up to 900 years to recover your wallet. However, if you remember most pieces of your password, an expert may be able to help you recover your wallet in a few days. - https://support.bitcoinarmory.com/kb/article/30-forgot-wallet-encryption-passphrase-password
Problem is not in forgeting passphrase, problem is that I've never even set a passphrase to begin with but it's still asking me for one. I wasn't even able to put passphrase. When I installed bitcoin core and tried to set the paraphrase it asked me for the "old passphrase" in order to set the new one, but what do I enter in the "old passphrase" when I've never even set a passphrase before?
There is not one by default, so the only possible explanation according to what you're saying is that when you installed Bitcoincore, it was installed atop an already existing wallet, so that when you loaded Bitcoincore, the wallet it had was already encrypted.
That's probabbly it, I've had bitcoin core on my computer before so I've probabbly installed new instance on top of that wallet.
