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Ideally for

Medium size company


Comodo SSL

Issue time

1-3 business days


Email / Documents

Validation Requirements

Domain Control, Identity Verification

Certificate Fields

[email protected], First Name, Last Name

Email Encryption & Signing


Document Signing


User Authentication


Secure Hash Algorithm


Key Encryption

2048 bit

Certificate Encryption

Up to 256-bit

Comodo Personal Authentication Certificate (CPAC) Pro is an easy, affordable, and excellent advanced solution to secure business communications such as emails, documents, and user access.

CPAC Pro allows you to encrypt emails, digitally sign emails and Microsoft® Office and OpenOffice business documents, and enable user two-factor authentication. To issue this SSL Certificate you will have to provide your email address, First Name, and Last Name, and pass Domain Control and Identity Verification.

Comodo Personal Authentication Certificates are fully trusted by all major email clients, as well as internet browsers, ensuring you a highly safe business communication. 

10 reviews for CPAC Pro

  1. 5 out of 5

    CPAC pro is crucial to our business!

    Posted on
  2. 5 out of 5

    Offers essential security features at a very low price.

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  3. 5 out of 5

    Encrypts all our document workflow. Highly recommended!

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  4. 5 out of 5

    Does everything as stated in its description. I’m installing this cert on all my clients’ servers.

    Posted on
  5. 5 out of 5

    CPAC Pro has helped our company transition from paper to digital document management. It’s an excellent solution at a very affordable price.

    Posted on
  6. 5 out of 5

    I bought this certificate to enable the two-factor authentication when logging on my network. The number of failed login attempts has reduced dramatically.

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  7. 5 out of 5

    So far, I’ve tested this product on MS Exchange, Lotus Notes, Thunderbird, and The Bat. I can confirm it works smoothly on all these email clients.

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  8. 5 out of 5

    In my line of work, I edit dozens of documents on a daily basis. Controlling a large document workflow isn’t always easy, but with Comodo CPAC PRO at least I have the peace of mind that all the data is safe.

    Posted on
  9. 5 out of 5

    A year ago, a security incident at our company compromised several important documents. It wouldn’t have happened if we had encrypted our email correspondence and documents. Since then, we’ve been using CPAC Pro across all our platforms without any issues.

    Posted on
  10. 5 out of 5

    I use CPAC Pro for 2 years – it’s a great solution when you need to exchange a lot of MS Office documents. Great price for it!

    Posted on

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Here is a list of the most common questions our customers have when buying a Comodo CPAC SSL Certificate:

Comodo (Sectigo) Personal Authentication Certificates provide you the highest level of protection by enabling end-to-end encryption of your email communications. By signing and encrypting your outgoing email messages, you protect them from Man-in-the-Middle attacks, https proxies, or packet-sniffers, therefore your messages can’t be intercepted and decrypted by a malicious third party.

Encrypting Email Messages guarantees their privacy and integrity, while digitally signing the messages authenticates you as being the genuine sender. In this way, you will secure yourself and your business from accidental or fraudulent data exposures, privacy breaches and other potential security threats associated with the business communication. 


Comodo (Sectigo) Personal Authentication Certificate lets you easily sign any valuable and critical personal or company document, therefore ensuring compliance with industry requirements of digitally signed documents. By digitally signing the document, you identify yourself as the authentic document signer and certify its integrity by proving that your document hasn’t been altered since it was signed. In this way, CPAC SSL Certificates help you migrate from ink & paper to digital workflows of contracts, sign-offs, request forms and other important company documents, working in tandem with or replacing the visible signature feature in Microsoft® products such as Microsoft Office Suite, Open Office Suite, VBA Macros and more.



Comodo (now Sectigo) Personal Authentication Certificate helps business reduce the risks and threats associated with using standard passwords through enabling the two-factor authentication of users. If you need a stronger guarantee that the person logging into your company network or account is your legitimate employee, CPAC SSL Certificates will allow you to secure your sensitive and private customer or corporate data by enabling the industry standard used by banks all over the world – two-factor authentication – seamlessly integrating the certificate as a second authentication element. In this way, you will protect your company access, including remote, from any hackers attempting to steal usernames and passwords. 

Comodo (now Sectigo) Personal Authentication Certificates were designed for individuals and businesses who are looking at implementing the best web security practices, such as email & document encryption and user two-factor authentication. However, each CPAC SSL Certificate was designed to fit a particular need. Just like DV, BV, and EV SSL Certificates, CPAC SSL Certificates come with different validation requirements which enable certain certificate fields:

  • CPAC Basic – requires Domain Control and displays only your email in the SSL Certificate
  • CPAC Pro – requires Domain Control and Identity Verification in order to display your email, First and Last Name in the SSL Certificate
  • CPAC Enterprise – requires Domain Control, Identity Verification, and Organization Validation in order to display your email, First and Last Name, as well as Company Name and Address in the SSL Certificate.

Based on your actual needs, you can now decide which Comodo Personal Authentication Certificate is the best option for you, providing you an enhanced web security of your business activity. 

There are many different ways to install an SSL Certificate, and they all depend on your SSL Certificate brand, the web server type, the operating system on your server, and the web hosting panel that you have on your server.

These being said, please check our Installation Articles to get detailed instructions on how to install your SSL Certificate on about 44 different server types, hosting panels and operating systems.

Also, here are links to documentation on how to install your SSL Certificate on your server, based on the SSL Certificate brand that you have:
Comodo (Sectigo)

We always recommend you to get specialized help with you SSL Certificate installation. If you have a web developer, or a system engineer, then they would be the right people to help you with your SSL Certificate installation.

If you want us to do the SSL Certificate installation for you, then we can definitely do that. We offer SSL Certificate installation services to our customers for a flat rate of $99.99 per domain per server.

Server and Client OS Compatibility

ClientOS Windows 7, Vista, XP, 2000, Snow Leopard, Mac OS

Server Platforms And Mobile Browser Compatibility

Server Platforms:
  • BEA Weblogic
  • IBM HTTP Server
  • Microsoft ISA
  • Microsoft IIS
  • Microsoft SQL Server 2005
  • Microsoft Live Communication
  • Apache
  • BEA Weblogic
  • Lotus Domino
  • OpenLDAP
  • C2Net Stronghold
  • Plesk
  • WebSTAR
  • Webmin
  • Java Web Server (Javasoft / Sun)
  • Ensim Control Panel
  • cPanel / Web Host Manager
  • Hsphere
  • C2Net Stronghold
  • iPlanet Server / Sun One
  • Java Web Server (Javasoft / Sun)
  • Lotus Domino
  • Tomcat
  • Netscape Enterprise Server
  • Novell ConsoleOne
  • Novel Webserver
  • C2Net Stronghold
  • And other SSL-Capable Servers
Mobile Browsers:
  • Android
  • Apple iPhone, iPod Safari 1+
  • Microsoft Windows Mobile 5/6*
  • Opera Mobile 6+
  • Opera Mini v3+
  • ACCESS NetFront Browser v3.4 +
  • RIM Blackberry v4.2.1 +
  • KDDI Openwave v6.2.0.12 +
  • Netscape Communicator 4.51+
  • NTT / DoCoMo
  • Nintendo Wii
  • Sony Playstation 3
  • Sony Playstation Portable

Need help securing your website? Have questions, or unsure which SSL to choose? Let our fearless dragons help you! Follow the following steps towards getting the type of help that you need.

1. Use our Wizard and find the SSL Certificate that suits you best;

2. Find your answers on our Frequently Asked Questions page;

3. Live Chat with one of our friendly web security dragons;

4. Open a Ticket with our Sales, Billing and Technical Support dragons. We will answer your ticket as soon as possible. We work Monday through Saturday, from 9 AM to 11:00 PM Pacific Time;

5. Email us at [email protected];

6. Email us using our Contact Form.

Duration Price You Save
1 year $29.99
2 years $59.99

Order Steps

  • Click "Buy Now"
  • Create/Access your account
  • Submit payment
Configure the certificate in your account
Pass validation & receive your SSL Certificate

Other certificates from this issuer:

CPAC Basic $10.99
Comodo PositiveSSL EV $77.49
CPAC Enterprise $44.99
See more

Certificates of the same validation:

No products found

SSLS that secure same domains / sub-domains:

CPAC Basic $10.99
CPAC Enterprise $44.99
CPAC Pro $29.99
See more