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Simply Explained - How Bitcoin Wallets Work (Public & Private Key Explained)

Thumbnail of the video “Simply Explained - How Bitcoin Wallets Work (Public & Private Key Explained)”
Community upload. AI output has not been independently verified.
Author: Simply Explained
Categories: Crypto
Tags: crypto
Views: 1 · Last viewed: 2026-10-13 21:58 UTC

Short Summary

Main recommendation: To use a cryptocurrency safely, keep your private key secret and treat it as proof of ownership, since the public key (wallet address) can be shared freely. The video explains how wallets are generated and why the private key controls access to the coins in a wallet. It also covers side effects such as wallets existing only once they receive coins, and the risks of sending coins to invalid addresses.

Key Points

  • Wallets are created by generating a linked public and private key pair with an elliptical curve digital signature algorithm, used by Bitcoin and Ethereum.
  • The private key can derive the public key, but the public key cannot be reversed into the private key.
  • The public key becomes the wallet address, similar to a bank account number, while the private key proves ownership and authorizes spending.
  • Anyone can generate unlimited wallets offline, but the blockchain only tracks transactions between wallets, so a wallet is unknown until it receives coins.
  • The blockchain has no list of valid addresses, so coins sent to a nonexistent address are effectively lost unless someone can derive its private key.

Details Worth Noting

  • Concrete instructions: To store coins most securely, generate a wallet while offline, print out the public and private keys, delete the private key from your computer, and then transfer coins to the wallet address. The video calls this a paper wallet and describes it as the most radical but very secure storage method.
  • Coin burning is when coins are sent to an invalid address, and some projects do it on purpose to reduce total supply and potentially raise the coin's value, or to remove coins not distributed during an initial coin offering.
  • Because wallets are not registered anywhere, anyone can create as many as their computer can generate key pairs.
  • The video compares the blockchain to a giant spreadsheet of transactions between wallets that does not care whether those wallets exist.
  • Offline wallet creation allows someone to receive coins at an address before you go online, and you can spend them later with the private key.

Bottom Line

Your private key is the only thing that gives you control over your coins, so protecting it matters more than the public address you share.