Beginners Guide To Ssl Certificates
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WHITE PAPER: BEGINNER’S GUIDE TO SSL CERTIFICATES White Paper Beginner’s Guide to SSL Certificates Making the Best Choice When Considering Your Online Security Options White Paper: Beginner’s Guide to SSL Certificates Beginner’s Guide to SSL Certificates Making the Best Choice When Considering Your Online Security Options CONTENTS Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 What is an SSL Certificate? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 How Does SSL Encryption Work? . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 How Do I Know That a Site Has a Valid SSL Certificate? . . . . . . . . . . . . . . 4 Where Would I Use an SSL Certificate? . . . . . . . . . . . . . . . . . . . . . . . . 5 Different Types of SSL Certificate . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Tech Talk Made simple . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Conclusion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2 White Paper: Beginner’s Guide to SSL Certificates Introduction Whether you are an individual or a company, you should approach online security in the same way that you would approach physical security for your home or business. Not only does it make you feel safer but it also protects people who visit your home, place of business, or website. It is important to understand the potential risks and then make sure you are fully protected against them. In the fast-paced world of technology, it is not always easy to stay abreast of the latest advancements. For this reason it is wise to partner with a reputable Internet security company. This guide will de-mystify the technology involved and give you the information you need to make the best decision when considering your online security options. For a glossary of terms, please see “Tech Talk Made Simple” at the end of this document. What Is an SSL Certificate? An SSL certificate is a digital computer file (or small piece of code) that has two specific functions: 1. Authentication and Verification: The SSL certificate has information about the authenticity of certain details regarding the identity of a person, business or website, which it will display to visitors on your website when they click on the browser’s padlock symbol or trust mark (e.g., the Norton™ Secured Seal). The vetting criteria used by Certificate Authorities to determine if an SSL certificate should be issued is most stringent with an Extended Validation (EV) SSL certificate; making it the most trusted SSL certificate available. SSL stands for “Secure Socket Layer.” It is a technology that establishes a secure session link between the visitor’s web browser and your website so that all communications transmitted through this link are encrypted and are, therefore, secure. SSL is also used for transmitting secure email, secure files, and other forms of information. Would you send your private information or banking details to someone on the back of a postcard? SSL creates a safe and private channel for you to communicate. 2. Data Encryption: The SSL certificate also enables encryption, which means that the sensitive information exchanged via the website cannot be intercepted and read by anyone other than the intended recipient. In the same way that a identity document or passport may only be issued by the country’s government officials, an SSL certificate is most reliable when issued by a trusted Certificate Authority (CA). The CA has to follow very strict rules and policies about who may or may not receive an SSL certificate. When you have a valid SSL certificate from a trusted CA, there is a higher degree of trust by your customers, clients or partners. How Does SSL Encryption Work? In the same way that you lock and unlock doors using a key, encryption makes use of keys to lock and unlock your information. Unless you have the right key, you will not be able to “open” the information. Each SSL session consists of two keys: • The public key is used to encrypt (scramble) the information. • The private key is used to decrypt (un-scramble) the information and restore it to its original format so that it can be read. 3 White Paper: Beginner’s Guide to SSL Certificates The Process: Every SSL certificate that is issued for a CA-verified entity is issued for a specific server and website domain (website address). When a person uses their browser to navigate to the address of a website with an SSL certificate, an SSL handshake (greeting) occurs between the browser and server. Information is requested from the server – which is then made visible to the person in their browser window. You will notice changes to indicate that a secure session has been initiated – for example, a trust mark will appear.If you click on the trust mark, you will see additional information such as the validity period of the SSL certificate, the domain secured, the type of SSL certificate, and the issuing CA. All of this means that a secure link is established for that session, with a unique session key, and secure communications can begin. How Do I Know That a Site Has a Valid SSL Certificate? 1. A standard website without SSL security displays “http:// ” before the website address in the browser address bar. This moniker stands for “Hypertext Transfer Protocol,” and is the conventional way to transmit information over the Internet. However, a website that is secured with a SSL certificate will display “https:// ” before the address. This stands for “Secure HTTP.” 2. You will also see a padlock symbol on the top or bottom of the Internet browser (depending on which browser you are using). 3. Often, you will also notice a trust mark displayed on the website itself. Symantec™ customers use the Norton Secured Seal trust mark on their websites. When you click on the Norton Secured Seal or the padlock symbol on the page, it will display details of the certificate with all the company information as verified and authenticated by the CA. 4. By clicking the closed padlock in the browser window, or certain SSL trust marks such as the Norton Secured Seal, the website visitor sees the authenticated organization name. In high-security browsers, the authenticated organization name is prominently displayed and the address bar turns green when an 4 White Paper: Beginner’s Guide to SSL Certificates Extended Validation (EV) SSL certificate is detected. If the information does not match, or the certificate has expired, the browser displays an error message or warning. Where Would I Use an SSL Certificate? The short answer to this question is that you would use an SSL certificate anywhere that you wish to transmit information securely. Here are some examples: • Securing communication between your website and your customer’s Internet browser. • Securing internal communications on your corporate intranet. • Securing email communications sent to and from your network (or private email address). • Securing information between servers (both internal and external). • Securing information sent and received via mobile devices. Different Types of SSL Certificates There are a number of different SSL certificates on the market today. • The first type of SSL certificate is a self-signed certificate. As the name implies, this is a certificate that is generated for internal purposes and is not issued by a CA. Since the website owner generates their own certificate, it does not hold the same weight as a fully authenticated and verified SSL certificate issued by a CA. • A Domain Validated certificate is considered an entry-level SSL certificate and can be issued quickly. The only verification check performed is to ensure that the applicant owns the domain (website address) where they plan to use the certificate. No additional checks are done to ensure that the owner of the domain is a valid business entity. • A fully authenticated SSL certificate is the first step to true online security and confidence building. Taking slightly longer to issue, these certificates are only granted once the organization passes a number of validation procedures and checks to confirm the existence of the business, the ownership of the domain, and the user’s authority to apply for the certificate. All Symantec SSL Certificates are fully authenticated. • Even though an SSL certificate is capable of supporting 128-bit or 256-bit encryption, certain older browsers and operating systems still cannot connect at this level of security. SSL certificates with a technology called Server-Gated Cryptography (SGC) enable 128- or 256-bit encryption to over 99.9 percent of website visitors. Without an SGC certificate on the Web server, browsers and operating systems that do not support 128-bit strong encryption will receive only 40- or 56-bit encryption. Users with certain older browsers and operating systems will temporarily step-up to 128-bit SSL encryption if they visit a website with an SGC-enabled SSL certificate. For more information about SGC please visit: http://go.symantec.com/ssl-certificates. 5 White Paper: Beginner’s Guide to SSL Certificates • A domain name is often used with a number of different host suffixes. For this reason, you may employ a Wildcard certificate that allows you to provide full SSL security to any host of your domain – for example, host.your_domain.com (where “host” varies but the domain name stays constant). • Similar to a Wildcard certificate, but a little more versatile, the SAN (Subject Alternative Name) SSL certificate allows for more than one domain to be added to a single SSL certificate. • Code signing certificates are specifically designed to ensure that the software you have downloaded was not tampered with while en route. There are many cybercriminals who tamper with software available on the Internet. They may attach a virus or other malicious software to an innocent package as it is being downloaded. These certificates make sure that this doesn’t happen. • Extended Validation (EV) SSL certificates offer the highest industry standard for authentication and provide the best level of customer trust available. When consumers visit a website secured with an EV SSL certificate, the address bar turns green (in high-security browsers) and a special field appears with the name of the legitimate website owner along with the name of the security provider that issued the EV SSL certificate. It also displays the name of the certificate holder and issuing CA in the address bar. This visual reassurance has helped increase consumer confidence in e-commerce. Tech Talk Made Simple Encryption: Information is “scrambled” so that it cannot be used by anyone other than the person for whom it is intended. Decryption: “Un-scrambling” information and put it back in its original format. Key: A mathematical formula, or algorithm, that is used to encrypt or decrypt your information. In the same way that a lock with many different combinations is more difficult to open, the longer the length of the encryption key (measured in number of bits), the stronger the encryption. Browser: A software program that you use to access the Internet. Examples include: Microsoft Internet Explorer (IE); Mozilla Firefox, Apple Safari, RockMelt, and Google Chrome. 6 White Paper: Beginner’s Guide to SSL Certificates Conclusion Trust makes all the difference in the world of online business. Investment in technology to protect customers and earn their trust is a critical success factor for any company that does business online or hosts an e-commerce website. The effective implementation of SSL certificates and correct placement and use of trust marks are proven tools in the establishment of customer trust. With the acquisition of VeriSign Authentication Services, Symantec is now the leading provider of SSL certificates globally, helping to assure customers that they are safe from search to browse to buy and sign in*. Symantec secures more than one million web servers worldwide, more than any other CA.* Symantec also secures over two-thirds of websites using Extended Validation SSL – including the biggest names in e-commerce and banking.* When you choose Symantec, you can rest assured that your website and your reputation are protected by the CA with a proven track record and the most recognized trust mark on the Internet. For more information, visit us at http://go.symantec.com/ssl-certificates. *Includes Symantec subsidiaries, affiliates, and resellers. 7 White Paper: Beginner’s Guide to SSL Certificates More Information Visit our website http://go.symantec.com/ssl-certificates To speak with a Product Specialist in the U.S. Call toll-free 1 (866) 893-6565 To speak with a Product Specialist outside the U.S. For specific country offices and contact numbers, please visit our website. About Symantec Symantec is a global leader in providing security, storage, and systems management solutions to help consumers and organizations secure and manage their information-driven world. Our software and services protect against more risks at more points, more completely and efficiently, enabling confidence wherever information is used or stored. Symantec Corporation World Headquarters 350 Ellis Street Mountain View, CA 94043 USA 1 (866) 893 6565 www.symantec.com Copyright © 2012 Symantec Corporation. All rights reserved. Symantec, the Symantec Logo, and the Checkmark Logo are trademarks or registered trademarks of Symantec Corporation or its affiliates in the U.S. and other countries. VeriSign and other related marks are the trademarks or registered trademarks of VeriSign, Inc. or its affiliates or subsidiaries in the U.S. and other countries and licensed to Symantec Corporation. Other names may be trademarks of their respective owners.
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