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You can secure your private keys using the Hardware Wallet such as Trezor https://cryptototem.com/trezor-wallet/. Such wallets are used for storing your coins and secure them from different interventions. The developers of such wallets ensure us that will not have any troubles with loss of coins and leakage of your personal data.


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How do I find out where a bitcoin address is from? You can't find a person, organisation or place from a Bitcoin address alone. A Bitcoin address isn't really an address in the normal sense. It doesn't label a place or person or anything else in the real world. Really its just a reference number produced from a secret number by a mathematical function. You ...


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If you do not remember making this transaction, your keys or devices may have been compromised. It is not possible to determine who or what entity holds the private keys to a bitcoin address - bitcoin is anonymous by design. Although there are techniques to link addresses to known parties such as exchanges, they are rarely 100% accurate, and usually cost ...


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which, as I understand it, makes some data (until 2017?) real without verification. You understand incorrectly. Firstly, the assumevalid blocks is updated at every major release, so it is at most a couple of months out of date for the most recent release. For Bitcoin Core 0.18.0, the assumevalid block is ...


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(This answer is a selection of quotes from an email I got from David Harding where he replied to my email reply to the newsletter. In the answer below, the quoted text is from my email question and the non-quoted text is from David Harding's reply) I think it is indeed a collision attack. The attack you describe is based on a database of preimages and ...


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Recommendations for how or where to buy Bitcoin are generally off-topic here, but long-term storage is a fair question. First, understand what owning Bitcoin really boils down to: having knowledge of the private key that allows you to spend the Bitcoin stored at that key's address. You aren't storing the bitcoins themselves persay, you just need to store ...


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Assuming you aren't too concerned about someone tracking the total amount of bitcoin you own, a paper wallet (potentially encrypted via BIP38) would be the safest bet. You only need to generate the key once and derived the address from it. The key can then be stored somewhere very safe (there are a number of vault services, operated by banks and other ...


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