1 Terminology and abbreviations
1.2 Abbreviations
The table below shows the abbreviations that are used throughout this unit, and their meanings.
Table 1: Abbreviations
| ADSL | asymmetric digital | PGP | Pretty Good Privacy |
| subscriber line | PING | packet internet groper | |
| DES | Data Encryption Standard | PSTN | public switched telephone |
| DMZ | demilitarised zone | network | |
| DNS | domain name system | RC2 | Rivest cipher 2 |
| DSS | Digital Signature Standard | RC4 | Rivest cipher 4 |
| FTP | file transfer protocol | RSA | Rivest, Shamir and |
| IANA | Internet Assigned Numbers | Adleman block cipher | |
| Authority | S-HTTP | secure hypertext transfer | |
| ICMP | internet control message | protocol | |
| protocol | S/MIME | secure/multipurpose internet | |
| IDEA | International Data | mail extensions | |
| Encryption Algorithm | SET | secure electronic transaction | |
| IP | internet protocol | SHA | secure hash algorithm |
| IPSec | internet protocol security | SIM | subscriber identity module |
| ISDN | integrated services digital | SMTP | simple mail transfer |
| network | protocol | ||
| ISO | International Organization | TCP | transmission control |
| for Standardization | protocol | ||
| LAN | local area network | UDP | user datagram protocol |
| MD5 | message digest 5 | VPN | virtual private network |
| MSP | message security protocol | XOR | exclusive-OR |
| NSA | National Security Agency | 3DES | Triple Data Encryption |
| OSI | open systems | Standard | |
| interconnection |