GeoTrust® is the world's second largest digital certificate
provider. More than 100,000 customers in over 150 countries
trust GeoTrust to secure online transactions and conduct
business over the Internet. Our range of digital certificate
and trust products enable organizations of all sizes to
maximize the security of their digital transactions cost-effectively.
Issued in minutes, easy set up and
install! Ideal for just getting started.
As low as$39.95/yr
A low-priced, value-branded SSL certificate
delivered to you within 10 minutes.
As low as$99.95/yr
True BusinessID with EV
Only Extended Validation SSL Certificates
trigger the green bar in high-security web browsers.
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
In terms of applications and protocols, SSL Certificates can be used to secure