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Easter egg

Hidden functionality within an application that is activated when an undocumented set of commands and keystrokes are entered. Easter eggs are typically used to display the credits for the development team or a humorous message and are intended to be non-threatening.

ECDH

Elliptic Curve Diffie-Hellman

ECDSA

Elliptic Curve Digital Signature Algorithm

EEPROM

Electrically erasable programmable read-only memory

Electronic funds transfer at point of sale (EFTPOS)

An electronic payment system involving electronic funds transfers based on the use of payment cards, such as debit or credit cards, at payment terminals located at the place the sale took place.

Elliptic curve cryptography

A group of asymmetric cryptographic algorithms underpinned by the mathematics of elliptic curves.

Email

Standing for 'electronic mail', a method of exchanging messages between people using electronic devices.

Emanation security (EMSEC)

Countermeasures used to reduce classified emanations from a facility and its systems to an acceptable level. Emanations can be radio frequency (RF) energy, sound waves or optical signals.

Emanation Security Program

An ACSC program that sets out the requirements for government and organisations to be formally recognised to conduct emanation security practices to national standards.

Encapsulating Security Payload (ESP)

A protocol used for encryption and authentication in Internet Protocol security (IPsec).

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