SSL Certificates to Meet Any Need

Learn how SSL secures online connections and protects sensitive data.

What is an SSL Certificate?

Digital certificates serve as the backbone of internet security.

Secure Sockets Layer (SSL) certificates, sometimes called digital certificates, are used to establish an encrypted connection between a browser or user's computer and a server or website. The SSL connection protects sensitive data, such as credit card information, exchanged during each visit, which is called a session, from being intercepted from non-authorized parties.

Creating a Secure Connection

SSL is the standard security technology for establishing an encrypted
link—here’s how it works.

Invisible to the end-user, a process called the “SSL handshake” creates a secure connection between a web server and a browser. Three keys are used to create a symmetric session key, which is then used to encrypt all in-transit data.

  1. Server sends a copy of its asymmetric public key to browser.
  2. Browser creates a symmetric session key and encrypts it with the server’s asymmetric public key then sends it to the server.
  3. Server decrypts the encrypted session key using its asymmetric private key to get the symmetric session key.
  4. Server and browser now encrypt and decrypt all transmitted data with the symmetric session key. This allows for a secure channel because only the browser and the server know the symmetric session key, and the session key is only used for that specific session. If the browser was to connect to the same server the next day, a new session key would be created.

Why You Should Use a Digital Certificate

Establish trust and online security for your website visitors and business.

Encrypt sensitive data
Activate HTTPS and the lock icon
Comply with PCI standards
Prove legitimacy
Strengthen brand identity
Increase SEO rank

Priority + Performance

DigiCert Secure Site combines the best of everything DigiCert has to offer: award-winning support, un-matched consumer recognition of the Norton Secured™ trust seal, our CertCentral management platform, and a suite of certificates to meet every need.


Compare SSL Certificates

Product Features

2-year Price (per year)
Award-winning customer support

Priority support and validation
Compatible with all major browsers and mobile devices
Secures both and
Highest authentication plus brand protection
$1 million
$1 million
$1 million
$1 million
$1.75 million
Secures unlimited subdomains

Technical Specifications

Standard X.509 certificates

Symmetric 256-bit encryption

RSA public-key SHA-2 algorithm (supports hash functions: 256, 384, 512)

ECC public-key cryptography (supports hash functions: 256 and 384)

Unlimited server licensing

Supports 2048-bit public key encryption (3072-bit and 4096-bit available)

Standard SSL

As low as




As low as



Multi-Domain SSL

As low as



Wildcard SSL

As low as



Secure Site TM Business Certificate

As low as



Why Choose DigiCert?

Our experts are available 24 hours a day, 7 days a week, so you won't wait for issuance or for help at any stage of certificate management.

Many Certificate Authorities only allow free reissues up to 30 days after purchase. DigiCert allows free reissues on unlimited servers for the life of your certificate.

Thanks to one of the oldest root certificates in the industry, DigiCert SSL certificates are trusted by all major browsers, mail systems, operating systems, and mobile devices.

Our validation experts issue your certificate within a few hours and DigiCert OCSP times are up to 8x faster than competitors, making for the fastest SSL in the industry.

DigiCert certificates feature 256-bit encryption, 2048-bit RSA keys signed with SHA-256. We also offer Elliptic Curve Cryptography (ECC) support.

Through CertCentral, we offer free tools to simplify and automate CSR generation, certificate installation, and certificate management.

DigiCert was a founding member of the CA/Browser Forum, and is one of the few Certificate Authorities developing new SSL technology to better protect customers.

HTTPS is one of the most powerful ranking factors for organic search, so our SSL certificates will help boost your rankings and overall visibility.

Users trust sites that have a website seal clearly on display. One study revealed that over 60% of customers said they abandoned a purchase because a trust logo was missing.

We Make SSL Easy

More five-star reviews than our competition combined.

★★★★★ 4.9 (4001)

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5 out of 5 stars.

My life's best experience

One of my life's best experience. Thank you Sunnie. The way you handled the verification process was amazing. Exceptional customer service.
5 out of 5 stars.

Awesome Service

Jubyung helped me with a cert order which was critical for a project. Very prompt.

Excellent Service.
5 out of 5 stars.

Just great!

Larry was amazing! Super proffesional, kind and patient slowly went with me through the validation process.
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