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 ==== Public Key Cryptography and Cryptocurrency

-Public key cryptography was invented in the 1970s and is a mathematical foundation for computer and information security.
+((("keys and addresses", "overview of", "public key cryptography and cryptocurrency")))Public key cryptography was invented in the 1970s and is a mathematical foundation for computer and information security.

 Since the invention of public key cryptography, several suitable mathematical functions, such as prime number exponentiation and elliptic curve multiplication, have been discovered. These mathematical functions are practically irreversible, meaning that they are easy to calculate in one direction and infeasible to calculate in the opposite direction. Based on these mathematical functions, cryptography enables the creation of digital secrets and unforgeable digital signatures. Bitcoin uses elliptic curve multiplication as the basis for its cryptography.