GeoTrust SSL Security Certificates

SSL and Digital Certificates

What are SSL and Digital Certificates?

Secure Socket Layer (SSL) is a protocol developed by Netscape in 1996 which quickly became the method of choice for securing data transmissions across the Internet. SSL is an integral part of most Web browsers and Web servers and makes use of the public-and-private key encryption system developed by Rivest, Shamir, and Adleman.

In order to make an SSL connection, the SSL protocol requires that a server should have a digital certificate installed. A digital certificate is an electronic file that uniquely identifies individuals and servers. Digital certificates serve as a kind of digital passport or credential which authenticate the server prior to the SSL session being established.

Typically, digital certificates are signed by an independent and trusted third party to ensure their validity. The "signer" of a certificate is known as a Certification Authority (CA), such as VeriSign, thawte and GeoTrust.

When should SSL be used and what can it secure?

There are two main online security problems that SSL certificates help solve:

  • Authentication - proving a company's (or server's) identity online and in so doing create a sense of trust and confidence in using a Web site.
  • Encryption - offering protection for the data submitted to a Web site (or between servers) so that in the event of interception, it will be unintelligible without the unique key used for decryption.

Solving these security problems allows online business to protect against the following scenarios:

  • Spoofing - The low cost of Web site design and ease with which existing pages can be copied makes it all too easy to create illegitimate sites that appear to be published by established organizations. In fact, con artists have illegally obtained credit card numbers by setting up professional-looking storefronts that mimic legitimate businesses.
  • Unauthorized Disclosure - when information is transmitted "in the clear", making it possible for hackers to intercept the transmissions and obtain sensitive information from customers.
  • Data alteration - the content of a transaction can be intercepted and altered en route, either maliciously or accidentally. User names, credit card, and social security numbers as well as currency amounts; indeed any information sent "in the clear" is all vulnerable to alteration.

So what are the practical applications of SSL certificates?

Firstly, looking at categories of data, the most common deployment is for securing transmission of financial information in ecommerce. However, with incidence of identity theft on the rise, protecting the transmission of a broad range of personally-identifiable information is becoming ever more important. This category of data would include identity and social security numbers, e-mail addresses and demographic information as well as account registration and login information.

In terms of applications and protocols, SSL Certificates can be used to secure the following:

  • Web Servers
  • Mail Servers
  • Databases
  • FTP Sites
  • Internet Chat
  • NNTP

GeoTrust QuickSSL® Premium SSL

GeoTrust QuickSSL Premium Certificates are convenient and economical entry-level SSL Certificates. These certificates enable up to 256-bit encryption (depending on your client's browser capability and the cipher suite installed on your Web server) and are issued through an automated process that usually results in certificates being issued within minutes of being ordered. This process verifies that a certificate purchaser has appropriate administrative rights to a Web server's domain.

Features and Benefits:

  • Domain-level authentication
  • Up to 256-bit encryption
  • GeoTrust True Site Seal embedded with a date/time stamp
  • Fast issuance, often within minutes
  • Unlimited, free self-service reissues.

GeoTrust True BusinessID® Wildcard

True BusinessID Wildcard is a good solution if you need to secure multiple fully qualified domains that reside on the same physical server and share the same second level domain name.

For example, if you need to secure the following Web sites:


And, all of these Web sites are hosted on the same server box, you can purchase and install one Wildcard Certificate issued to * to secure all these sites. The number of sub domains that you can use the Wildcard Certificate to secure is unlimited, for example, the same certificate can be used every time you add a new sub domain to If you need to span the wildcard certificate across multiple physical servers, you may purchase additional licenses.

True BusinessID Wildcard Certificates enable up to 256-bit encryption (depending on your client's browser capability and the cipher suite installed on your Web server) and authenticate the identity of your organization.


  • Full organization validation
  • Enables 40-bit up to 256-bit encryption
  • Secure multiple fully qualified domains that share the same second level domain name on one server
  • GeoTrust True Site Seal embedded with your company name and a date/time stamp
  • Compatible with 99%+ of all browsers
  • Free lifetime, self-service reissues

If you have further questions regarding SSL security certificates or would like to order a certificate for your web site, send us an email at or ring us on 02 9043 0613.

Protect Your Email

Protect your Email against Spam and Viruses
Learn more »

Custom Web Designs

100% Custom design, mockup approval,
Learn more »

Simplify your Email Marketing

Keep your customers interested and returning to your site Learn more »

SSL Certificates for $95/yr

Premium 128 Bit SSL Certificate, free installation Learn more »