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Table Of Contents  CertiGuide to Security+
 9  Glossary

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RAS (Remote Access Server)

Used a remote connection (such as a modem) to connect to a network. Supports different transport protocols. MS-Chap can authentic a user and re-challenge during the session

http://www.webopedia.com/TERM/R/RAS.html

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/rras/rras/rassecuritydialogbegin.asp

RBAC (Role Based Access Control)

Security procedures that are based on organization-specific protection guidelines

http://www.securecomputing.com/pdf/rbac.pdf

http://hissa.ncsl.nist.gov/rbac/paper/rbac1.html

Radius (Remote Authentication Dial-In User Service)

Allows remote access after authenticating via a central server. Refer to TACACS

http://searchsecurity.techtarget.com/sDefinition/0,,sid14_gci214249,00.html

RC5 (Rivest Cipher 5)

A popular block cipher algorithm

http://www.rsasecurity.com/rsalabs/faq/3-6-4.html

Replay attack

An attack on an authentication system by recording and replaying previously sent valid messages (or parts of messages).

http://www.cis.ohio-state.edu/cgi-bin/rfc/rfc1704.html

Reverse DNS

Reverse DNS lookup is using an Internet IP address to find a domain name. May be helpful to authenticate incoming connections

http://www.whitehats.ca/main/members/Jeff/jeff_dns_security/jeff_dns_security.html


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