A public key is an alphanumerical series of characters that acts as a mechanism, when used in conjunction with a private key, to provide a means signing transactions and verifying oneself on a blockchain. Every public key is created from a corresponding private key in such a manner where the two are exclusively tied together. That is no other private key can create that same public key. The concept of the public/private key pair acts as the corner stone of modern day cryptography.
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