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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

Sectigo Personal Authentication Certificate (CPAC) Pro is an easy, affordable, and advanced solution to secure business communications such as emails, documents, and user access. The ideal choice for small and medium-sized companies, this email certificate brings the following benefits:

Email Encryption

Sectigo CPAC Pro digitally signs your emails and offers end-to-end encryption between you and your recipients. Once the email leaves your server, it remains secure until it reaches its destination. Hackers can’t intercept or tamper with your correspondence in any way. The 256-bit encryption and a 2048-bit signature key are industry-standard technology for data protection.

Microsoft® Office and OpenOffice Document Signing

This certificate can secure your business documents and help you migrate from ink paperwork to electronic contracts, forms, sign-offs, and other essential documents. A digitally signed document confirms the identity of the document signer.

Two-Factor Authentication

This certificate can secure your business documents and help you migrate from ink paperwork to electronic contracts, forms, sign-offs, and other essential documents. A digitally signed document confirms the identity of the document signer and prevents hackers from altering its contents.

FDA ESG compliant

If you’re doing business with the FDA (Food and Drug Administration), encrypting your emails is required. The ESG (Electronic Submission Gateways) verifies the senders’ identity before sending your email to the relevant FDA office. This email certificate ensures smooth and secure communication with the FDA.

Domain Control and Identity Verification

To receive this SSL Certificate, you will have to provide your email address, First Name, and Last Name and pass Domain Control and Identity Verification. The process takes between 1-3 business days.

Compatible with almost any platform

Sectigo Personal Authentication Certificates are fully trusted by all major servers, email clients, as well as internet browsers. You can install them on Windows, Linux, Mac, and many other platforms. They also support major email servers such as Netscape Communicator, Microsoft Outlook, Microsoft Exchange, and Mozilla Thunderbird.

15 reviews for CPAC Pro

  1. 5 out of 5

    Review by Anderson

    An indispensable addition to the web security measures of any company.

    Posted on
  2. 5 out of 5

    Review by Elmor

    Helped us transition from paper-based to electronic documents workflow.

    Posted on
  3. 5 out of 5

    Review by Derick

    80% of my business relies on email and document exchange. The CPAC pro has been safeguarding my messages and their contents for two years now. Great product!

    Posted on
  4. 5 out of 5

    Review by Arina

    Client is very happy with this product. Thanks☺

    Posted on
  5. 5 out of 5

    Review by Damien

    We’ve secured our emails and documents, and added the two-factor authentication as well. This product is so powerful, yet extremely affordable.

    Posted on
  6. 5 out of 5

    Review by Trenton

    CPAC pro is crucial to our business!

    Posted on
  7. 5 out of 5

    Review by Guillaume

    Offers essential security features at a very low price.

    Posted on
  8. 5 out of 5

    Review by Cedric

    Encrypts all our document workflow. Highly recommended!

    Posted on
  9. 5 out of 5

    Review by Lyndsey

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

    Posted on
  10. 5 out of 5

    Review by Shaun

    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
  11. 5 out of 5

    Review by Christina

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

    Posted on
  12. 5 out of 5

    Review by Mark

    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.

    Posted on
  13. 5 out of 5

    Review by Benjamin

    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
  14. 5 out of 5

    Review by Anne

    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
  15. 5 out of 5

    Review by Luis

    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 Sectigo CPAC SSL Certificate:

What are Multi-Year SSL Subscription Plans?

Starting with August 19th, 2020, the maximum duration of publicly-trusted SSL/TLS certificates issued by all Certificate Authorities (CAs) has been set to a maximum of 13 months.

However, in order to make your SSL Management process time-saving and cost-effective, the CAs and SSL Dragon are offering you the 2 Year and 3 Year SSL Subscription Plans.

This means that you can still buy a 2 or 3 year SSL Certificate and continue to benefit from multi-year discounting, while still remaining compliant with the CAB Forum SSL requirements.

How the Multi-Year SSL works?

Due to security reasons, your SSL certificate is initially issued with a maximum 1-year validity.

Prior to the expiration of your certificate, SSL Dragon, on behalf of the CA, we will issue a free replacement certificate for an additional 1-year certificate, according to your Subscription Plan.

You will need to validate & install the replacement SSL:

a. If you have a Domain Validation SSL Certificate, a short verification of your domain name will be required via Email, HTTP, or DNS in order to issue the 1-yr replacement SSL.

b. If you have a Business or Extended SSL Certificate – an additional Business Validation/Extended Validation recheck and callback process will also be required.

You can still reissue your certificate at any time and as many times as you like during your Multi-Year SSL Subscription Plan.

On your SSL Certificate’s page within the SSL Dragon account, you will find all the details regarding your Subscription Plan:

  • Valid From – Shows the date when your SSL was issued and became active
  • Expires – Shows the date when your SSL expires and needs to be reissued (not Renewed).
  • Subscription Starts – The date when the first SSL was issued and the subscription period activated
  • Subscription Ends – The date when the subscription ends and SSL needs to be Renewed (not Reissued)
  • Next Reissue – shows the number of days left of your SSL. The Certificate should be reissued 30-days prior to this date.

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 business communication. 


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.



 Sectigo Personal Authentication Certificate helps businesses reduce the risks and threats associated with using standard passwords by 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. 

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 Sectigo Personal Authentication Certificate is the best option for you, providing you an enhanced web security of your business activity. 

You can install your Sectigo CPAC Certificate as soon as it has been issued to you.

Here are installation instructions for different browsers, email clients, and mobile devices provided by Sectigo:

Here are the steps that you need to do in order to reissue your Sectigo CPAC Certificate:

1) Login at using the username and password that you used when you configured your Sectigo CPAC initially;
2) Once you are logged in, find the “Replace” button and click on it;
3) You will start the reissue process for your Sectigo CPAC SSL.
4) Follow the steps and instructions that come next, until you complete the Sectigo CPAC Certificate reissue.

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. 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;

4. Email us using our Contact Form.

Duration Price You Save
1 year £28.70
2 years £49.20
3 years £73.80

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:

Sectigo Document Signing Certificate £191.33
Sectigo Pro S/MIME £30.88
Sectigo Personal S/MIME £12.30
See more

Certificates of the same validation:

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SSLS that secure same domains / sub-domains:

Sectigo Document Signing Certificate £191.33
Sectigo Pro S/MIME £30.88
Sectigo Personal S/MIME £12.30
See more