A | B | C | D | E | F | G | H | I | J | K | L | M |
N | O | P | Q | R | S | T | U

EDI
Electronic (business) Data Interchange.

Electronic Commerce (E-commerce)
Business transactions conducted over the Internet.

Electronic Mail (E-mail)
Messages sent electronically from one person to another via the Internet.

Electronic Money
Electronic mathematical representation of money.

Elliptic Curve Cryptography (ECC)
A public key cryptographic method that uses much smaller keys than RSA and so operates faster.

Emergency Response
A response to emergencies such as fire, flood, civil commotion, natural disasters, bomb threats, etc., in order to protect lives, limit the damage to property and the impact on MIS operations.

Encapsulating Security Protection (ESP)
One of two protocol choices (the other is Authentication Header) in Internet Protocol Security (IPsec). IPsec protocol controls if confidentiality and/or message integrity are used to protect a data packet.

Enciphering
The conversion of plaintext or data into unintelligible form by means of a reversible translation that is based on a translation table or algorithm. See also: Encryption.

Encryption
The conversion of plaintext or data into unintelligible form by means of a reversible translation that is based on a translation table or algorithm. See also: Enciphering.

Entity
Something that exists as independent, distinct or self-contained. For programs, it may be anything that can be described using data, such as an employee, product, or invoice. Data associated with an entity are called attributes. A product's price, weight, quantities in stock, and description all constitute attributes. It is often used in describing distinct business organizations or government agencies.

Environment
The aggregate of external circumstance, conditions, and events that affect the development, operation, and maintenance of a system. Environment is often used with qualifiers such as computing environment, application environment, or threat environment, which limit the scope being considered.

Evaluation
Evaluation is the assessment for conformance with a preestablished metric, criteria, or standard.

Exhaustive Search
Checking every possibility individually till the right value is found. See also attack.

Expiration Date
Certificates and keys may have a limited lifetime; expiration dates are used to monitor this.

Exponential Function
A function where the variable is in the exponent of some base, for example, bN where N is the variable, and b is some constant.

Exponential Running Time
If the running time, given as a function of the length of the input, is an exponential function, the algorithm is said to have exponential running time.

Export Encryption
Encryption, in any form, which leaves its country of origin. For example, encrypted information or a computer disk holding encryption algorithms that is sent out of the country.