What is a Bitcoin Wallet Key?

Before the birth of Bitcoin, people often used passwords, including wallet keys. This is a tool that allows users to control their private keys. The Bitcoin wallet key is a password card stored on a computer, with the aim of preventing theft, malicious attacks, and other activities. The purpose of the Bitcoin wallet lock is to protect the user’s privacy. For example, if someone wants to manage your cryptocurrency account or make transfers through a certain website using a mnemonic phrase, you can use a mobile application (such as a browser) to view these transactions.

However, this method is not accessible to everyone. Some people consider it as an anonymous and unbreakable technology. So many people simply understand its functionality as: one address can have multiple transactions and allow anyone to create multiple digital signatures, ensuring that each person owns the account and the ownership behind it. (Image source: internet)

But why can’t it be used? Because in many cases, it is not possible to convert a private key into a digital signature string, nor can the existence of information be verified. For example, if you are unsure who holds the private key or which addresses may belong to you, you can modify the private key and file at any time.