What is cryptography?
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Cryptography is the science and art of creating and using codes and ciphers to protect sensitive information from unauthorized access, disclosure, or destruction. Cryptography is used to protect data from unauthorized access, modification, or disclosure. Cryptography can also be used to secure data transmissions, such as e-mail and web browsing. Cryptography also plays an important role in the security of computer networks, such as the Internet. Codes and ciphers are used to encode and decode information. For example, when you type in a password on a computer, the computer uses a code to encrypt the password. When you send an e-mail, you use a code to encrypt the message.