A-E

• Access control list: 


  It is an IT resource (computer directory, data file, program, or printer) that controls access to the resources.
• Access token: 


  A key information about the user, including user ID, password, user group, and privileges granted to the user.
• Advance encryption standard (AES): 


  It is a 128-bit encryption technique that has become a U.S. government standard for private key encryption.
• Algorithm:

  It is the procedure of shifting each letter in the clear text message the number of positions that the key value indicates.
• Application-level firewall: 


  A higher level of customizable network security.
• Botnets: 


  The collections of compromised computers.
• Caesar cipher: 


  The earliest encryption method which Julius Caesar is said to have used to send coded messages to his generals in the field.
• Call-back device: 


  Hardware component that asks the caller to enter a password and then breaks the connection to perform a security check.
• Certification authority (CA): 


  A digital certificate that is issued by a trusted third party.
• Compiler:

  Language translation modules of the operation system.
• Data collision: 


  Two or more signals are transmitted simultaneously that destroy both messages.
• Data encryption standard (DES): 


  An older encryption technique of Triple-DES encryption.
• Deep packet inspection (DPI):


  An analytical and statistical techniques to evaluate the contents of message packets.
• Denial of Service (DoS): 


  It is an assault on a Web server to prevent it from servicing its legitimate users.
• Digest: 


  It is a mathematical value calculated from the text content of the message.
• Digital certificate: 


  A process that proves the message received was not tampered with during transmission.
• Digital envelope: 


  It is the usage of data encryption standard (DES) and Rivest-Shamir-Adleman (RSA).
• Digital signature: 


  It is an electronic authentication that cannot be forged.
• Discretionary access privileges: 


  A grant access privileges to other users
• Distributed denial of service (DDoS): 


  A form of a SYN flood or smurf attack.
• Echo check: 


  Technique that involves the receiver of the message returning the message to the sender.
• EDE3: A key to encrypt the message.
• Electronic data interchange (EDI):


  The intercompany exchange of computer-processible business information in standard format.
• EEE3: Three different keys to encrypt the message three times.
• Encryption: 


  Technique that uses a computer program to transform a standard message being transmitted into a coded (cipher text) form.
• Event monitoring: 


  A key activity related to system resources.