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Last modified: Thursday, July 28, 2005 

(pronounced as separate letters) Short for Secure Sockets Layer, a protocol developed by Netscape for transmitting private documents via the Internet. SSL uses a cryptographic system that uses two keys to encrypt data − a public key known to everyone and a private or secret key known only to the recipient of the message. Both Netscape Navigator and Internet Explorer support SSL, and many Web sites use the protocol to obtain confidential user information, such as credit card numbers.By convention, URLs that require an SSL connection start with https: instead of http:.

Another protocol for transmitting data securely over the World Wide Web is Secure HTTP (S-HTTP). Whereas SSL creates a secure connection between a client and a server, over which any amount of data can be sent securely, S-HTTP is designed to transmit individual messages securely. SSL and S-HTTP, therefore, can be seen as complementary rather than competing technologies. Both protocols have been approved by the Internet Engineering Task Force (IETF) as a standard.

Also see SSL: Your Key to E-commerce Security in Webopedia's "Did You Know...?" section.

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For pages about SSL . Also check out the following links!

Related Links

DRM Watch 
Analysis of digital rights management technology.

Netscape's SSL Page 
Describes what SSL is and how it works. with information on server and personal certificates.

VeriSign SSL Certificate Page 
VeriSign offers Secure Site Services designed to apply encryption to e-commerce transactions and transmission of confidential information.

Describes Apache-SSL, a secure Webserver, based on Apache and SSLeay/OpenSSL.

Secured Transmission (SSL , HTTPS)
An open, non-proprietary protocol is perhaps the most common way of providing encrypted transmission of data between Web browsers and Web servers.

Security and Encryption Links
Comprehensive collection of security related links.

SSL 3.0 Specification
Contains links to SSL 3.0 specification drafts and information about implementing SSL.

SSL Basics for Internet Users
A plain-English guide to frequently asked SSL questions.

SSL Certificate Authority
InstantSSL is a low cost SSL Certificate Authority that provides High Assurance, fully validated SSL Certificates.

SSL protocol version 3.0 - Internet draft document
This document specifies Version 3.0 of the Secure Sockets Layer (SSL V3.0) protocol, a security protocol that provides communications privacy over the Internet.

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Time Warner Cable Business Class: Security Management - Internet solutions for businesses. Instant connectivity and fast downloads. Managed security for safe transmissions and storage of sensitive data.

related categories

Digital Rights Management (DRM)

Electronic Commerce

Internet Protocols


World Wide Web

related terms

digital certificate

digital signature

digital wallet








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