Secure Sockets Layer provides a secure connection between internet browsers and websites, allowing you to transmit private data online. Sites secured with SSL display a padlock in the browsers URL and possibly a green address bar if secured by an EV Certificate.

It is used by millions of e-Business providers to protect their customers, ensuring their online transactions remain confidential. All web pages that expect their visitors to submit confidential data, including credit card details, passwords or any personal information should use encryption. Web browsers can safely interact with secured sites as long as the site's certificate is from a recognized Certificate Authority, such as Comodo.

Show your website is secure with Comodo SSL!

Secure Sockets Layer

The internet has spawned new global business opportunities for enterprises conducting online commerce. However, that growth has also attracted fraudsters and cybercriminals who are ready to exploit any opportunity to steal consumer data such as bank account numbers and credit card details. Unless the connection between a client (e.g. internet browser) and a web server is encrypted, then any moderately skilled hacker can easily intercept and read the traffic.

How can I tell when a site is secure?

When a digital certificate is installed on a web page, users will see a padlock icon in the browser address bar. When an Extended Validation Certificates is installed on a web site, the address bar will turn green during secure sessions.

Secure websites appear with https:// at the beginning of the URL

Chrome SSL Address Bar

Firefox SSL Address Bar

 IE SSL Address Bar

Who Issues SSL Certificates?

Digital certificates are issued by a recognized Certificate Authority (CA) after confirming the identity and ownership of the company applying for the certificate. Certificates issued to a website are chained to what is known as a 'trusted root' certificate, which is owned by the CA. These root certificates are embedded in what is known as the 'certificate store' in popular internet browsers such as Chrome, Firefox and Internet Explorer.

If a browser encounters a website certificate which chains to a root in its certificate store, then it allows the https connection to proceed. If the browser encounters a certificate which is not chained to a root in its store, then it will warn the end user that the connection is not secure and that they should not submit any confidential information.

What Details are Included in the Certificate?

Details typically include the domain name, company name, address, city, state and country of the legally accountable company or individual who owns the certificate. It also contains an issued date and an expiry date and contains details of the CA responsible for issuing the certificate.

How do I Generate Certificate Signing Request?

Creating CSR – A Certificate Signing Request is the first step towards enrolling for a certificate. The exact method you need to use to generate a CSR will depend on your web-server software. To create a CSR, you will typically follow a wizard on your web server software which will ask you to enter domain and identity details such as organization name and address.

How do I Install a Certificate on my Web-Server?

Certificate Installation - The process for installing a certificate depends on your web-server software. Comodo has a range of documentation that explains how to install your certificate on a range of different web-servers.

* IIS Users * Comodo offers a free utility which automates the entire CSR generation and certificate installation processes. It allows you to quickly generate a CSR for your order, easily complete the domain validation process then configure and install your certificate with a single click.

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Complete Trust Assurance for your Website

Instant SSL certificates are designed to secure domains with the highest available levels of encryption and are trusted by all major browsers. Each certificate features full business validation, a free TrustLogo site seal, unlimited server licenses, 24/7 support, up to $250,000 warranty, free website virus scanning, free PCI scanning and a cast iron 30-day money back guarantee.

Your customers will never see any browser error messages because Instant SSL certificates are supported by 99.9% of browsers and mobile devices. Our high impact site seal boosts trust in your site and aids conversion with its unique ‘point-to-verify technology’ technology - displaying your security credentials whenever a visitor places their mouse over the seal. We offer best-in-class 24/7 technical support to fix any issues during the life-cycle of your SSL Certificate.

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High-strength, low-cost security for online businesses

Essential SSL certificates are the fast, cost-effective way for online merchants to protect customer transactions with the highest levels of security. Featuring the strongest possible levels of encryption, fast online issuance, dedicated customer support and a large $10K warranty, Essential SSL certificates let you quickly create a secure online business environment at a budget that suits you.

There's no long waits or documents to submit, simply complete our simple online validation process and your certificate will be issued in minutes. Each certificate also uses the highest possible levels of security for you and your customers, providing 2048 bit signatures, SHA-2 hash algorithms and up to 256 bit encryption.

Protect your online services with Comodo Essential SSL at an affordable price. Comodo provides industry leading website protection with 24/7 live customer support to swiftly fix any issues.

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Green Address Bar Builds Trust in Your Brand

Extended Validation (EV) SSL certificates are the gold standard of SSL certificates and offer the highest degree of identity assurance to your website visitors. A website is awarded an EV SSL certificate only after the applicant goes through extensive background checks based on the standards set by the Certificate Authority/Browser (CA/B) Forum guidelines.

Because of this, EV certificates contain a unique differentiator designed to clearly communicate the trustworthiness of the website to its visitors. Whenever somebody visits a website that uses an EV certificate, the address bar will turn green in major browsers such as Internet Explorer, Firefox and Chrome. EV certificates are used by all major online retailers and banks and are highly recommended for businesses that wish to immediately build customer trust in their site. Additionally, the name of the Certificate Authority (CA) that issued the EV SSL also appears within the green address bar, making it easier for website visitors to understand the issuing authority's identity and trust the website's security status.

EV SSL certificates feature a $1,750,000 warranty and are used by major online brands, e-commerce storefronts, banks, payment services and government websites. Websites that require the highest levels of security and who wish to present an immediate statement of trust to their customers should opt for EV SSL every time.

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Secure Your Domain and All First-Level Sub-Domains

Comodo Wildcard certificates save your business time and money by allowing you to secure your domain and all sub-domains with a single certificate. Featuring the highest available levels of encryption, unlimited server licenses, dedicated customer support and a huge $250K warranty, Comodo Wildcard certificates allow you to simplify certificate management processes and save you money versus individual certificate purchases.

Wildcard certificates work the same way as a regular SSL Certificate, allowing you to secure the connection between your website and your website visitors – but with one major advantage! A single Comodo Wildcard certificate automatically covers all of the sub-domains of your main domain without the need to purchase or manage multiple certificates.

For example, a Wildcard certificate for * will secure the main domain and will also secure to,,, etc. Comodo Wildcard SSL certificates also come with unlimited server licenses, meaning you can export them to as many physical servers as you wish without additional cost.

Think of it as buying a single and cost-effective insurance policy that covers your medical expenses, your car, house, etc. instead of buying individual policies that cost more. A Wildcard SSL certificate from Comodo comes with a 2048-bit encryption as standard, free PCI scanning, free daily vulnerability scanning, free site seal and a $250,000 warranty.

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Secure Multiple Websites on a Single Unified Communications Certificate

Unified Communications Certificates (UCC) SSL certificates – also called SAN or Multi-Domain certificates – allow you to secure multiple domains on a single certificate. Originally designed to work with Microsoft Exchange environments, UCC’s can save you money over single certificate purchases and help reduce certificate management hassles. SAN certificates issued by Comodo can cover up to 100 fully qualified domain names (FQDN) on a single certificate.

UC certificates offer more flexibility than traditional wildcard certificates since they are not limited to a single domain. For instance, a wildcard certificate can protect all first-level subdomains on a single domain, but cannot protect both and A Unified Communications Certificate is capable of protecting both these domains and all the sub-domains under them. You can even add wildcard domains to a UCC.

UC certificates simplify management if you have multiple websites because you need only worry about one certificate instead of many. They also eliminate the need for different IP addresses per website that would be required otherwise. UC SSL certificates are trusted by over 99.9% of browsers and mobile devices and can provide huge savings to organizations that need to secure transactions on multiple domains.

Comodo is one of only a few providers authorised by the Microsoft Corp. to issue UC SSL certificates.

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