# Cryptography 1. Cryptography is the branch of mathematics that lets us create mathematical proofs that provide high levels of security. Online commerce and banking already uses cryptography. In the case of [[Bitcoin (blockchain)]], cryptography is used to make it impossible for anybody to spend funds from another user's wallet or to corrupt the [[blockchain]]. It can also be used to encrypt a [[wallet]], so that it cannot be used without a password. 2. It is a branch of studies that deals exclusively with the securitization of sensitive data. 3. Is the practice and study of techniques for secure communication, focusing on code, cipher systems, methods, and the like. An example is the [[Asymmetric Encryption|asymmetric]]-key [[cryptography]] used in the [[Bitcoin (blockchain)|Bitcoin]] network. Bitcoin [[Public Key|public key ]] addresses have matching [[Private Key|private key]]s that allow funds to be unlocked for the spending of the cryptocurrency. 4. Refers to the process of encrypting and decrypting information. Mathematics creates codes and ciphers, in order to conceal information. Used as the basis for the mathematical problems used to verify and secure transactions on the [[Blockchain|blockchain]]. 5. The practice and study of techniques for secure communication in the presence of third parties. [[Bitcoin (blockchain)]] and other [[Crypto (cryptocurrency)|currencies]] are related to cryptography insofar as they use mathematics to secure information. Within Bitcoin, [[Cryptography|cryptography]] creates and secures [[Wallet|wallets]], signs all [[Transaction(s)|transactions]], and verifies each and every transaction on the blockchain. 7. [[Cryptography]] is a method of storing and sending data in a form so that it can only be read and processed by its intended recipient. 8. A method for secure communication using code. [[Symmetric Encryption|Symmetric-key]] cryptography is used by various [[blockchain]] networks for transfer of cryptocurrencies. Blockchain [[Address|addresses]] generated for [[Wallet|wallets]] are paired with [[Private Key]] that allow transfer of cryptocurrency. Paired public and private keys allow funds to be unlocked.