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glossary
| Abbreviation |
Term |
Definition |
| zero-day exploit |
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A zero-day exploit is one that takes advantage of a security vulnerability on the same day that the vulnerability becomes generally known. Ordinarily, after someone detects that a software program contains a potential exposure to exploitation by a hacker, that person or company can notify the software company and sometimes the world at large so that action can be taken to repair the exposure or defend against its exploitation. Given time, the software company can repair and distribute a fix to users. |
| zombie |
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In one form of denial of service attack, a zombie is an insecure Web server on which malicious people have placed code that, when triggered at the same time as other zombie servers, will launch an overwhelming number of requests toward an attacked Web site, which will soon be unable to service legitimate requests from its users. |
| ZRTP |
Zimmermann Real-Time Transport Protocol |
ZRTP is a voice over IP (VoIP) encryption extension for the Real-Time Transport Protocol (RTP). The "Z" in "ZRTP" is the first letter of the surname of Phil Zimmermann, an engineer best known for inventing Pretty Good Privacy (PGP). |
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