Modern ciphers enable private communication in many different networking protocols, including the Transport Layer Security (TLS) protocol and others that offer encryption of network traffic. Many communication technologies, including phones, digital television and ATMs, rely on ciphers to maintain security and privacy.

Why are codes and ciphers important?

From the beginnings of communication, there has been a need for secrecy. Codes and ciphers are a means of producing secret communications. Codes and ciphers are forms of cryptography, a term from the Greek kryptos, hidden, and graphia, writing.

How are ciphers used in everyday life?

'Cryptography in everyday life' contains a range of situations where the use of cryptography facilitates the provision of a secure service: cash withdrawal from an ATM, Pay TV, email and file storage using Pretty Good Privacy (PGP) freeware, secure web browsing, and use of a GSM mobile phone.