Ever heard of an \u201cS MIME certificate\u201d or a \u201cComodo SMIME certificate?\u201d How about an \u201cS\/MIME certificate?\u201d All three are basically the same thing \u2014 the difference is that one of them just happens to include a trusted certificate authority\u2019s (CA\u2019s) name, and one of the terms is written with a forward slash (\/) in it. So, this means a Comodo S\/MIME certificate<\/a> is an S\/MIME certificate that\u2019s issued by Comodo CA.<\/p>\n Yeah, those are the only differences between the terms. Some people write \u201cS\/MIME\u201d as \u201cS MIME\u201d and others writer it all as one word like \u201cSMIME.\u201d But this may leave you wondering one important question: What is S\/MIME?\u201d<\/p>\n <\/p>\n Regardless of how you choose to write it, here\u2019s what you should know about what this type of certificate is, what it does, and what specifically a Comodo S\/MIME certificate entails.<\/p>\n Here\u2019s the short and the long of it \u2014 an S\/MIME certificate<\/a> is a digital certificate that secures email messages and asserts identity. A bit more of an in-description is that it\u2019s an email signing certificate that individuals and organizations use to digitally sign their emails and\/or encrypt the content of their messages. You can choose to sign or encrypt your emails \u2014 or do both \u2014 with your certificate. The choice is up to you and what you wish to do with it.<\/p>\n S\/MIME itself is an acronym that stands for \u201csecure\/multipurpose internet mail extension<\/a>.\u201d This refers to an email signing protocol that\u2019s used to sign MIME data such as the header and body of emails.<\/p>\n Email encryption helps to protect your business against cybercriminals by:<\/p>\n Using an S\/MIME cert also helps you be compliant with industry regulations relating to email security and transmitting individuals\u2019 personal or financial information or data. This includes DFARS, GDPR, and HIPAA.<\/p>\n If you\u2019re concerned that your email client won\u2019t be able to handle an email signing certificate, then we have great news for you. Many of the major email platforms support S\/MIME certificates, including Outlook, Thunderbird, and Apple Mail!<\/p>\n While the benefits of using an S\/MIME certificate sound great, how does it all work?<\/p>\n The way that the certificates encrypt emails is through the use of asymmetric encryption, or what\u2019s also referred to as public key encryption. Essentially, an email is digitally signed using a private key and authenticated with the recipient\u2019s public key.<\/p>\n This public key is then sent to the recipient along with the encrypted email, which allows your email recipient to verify that it actually came from you and not an imposter. The recipient then can use their corresponding private key to decrypt the message and access the information.<\/p>\n While both are based on public key encryption, an S\/MIME certificate provides valuable end-to-end encryption to protect data at rest. This differs from an SSL\/TLS certificate<\/a>, which provides data in transit protection only. When it comes to email security, the differences between the two certificates include the following:<\/p>\n Comodo CA<\/a>, now Sectigo, is a reputable third-party certificate authority (CA) that web browsers and platforms trust. They\u2019re also the world\u2019s biggest CA. In their role, Comodo CA issues all types of X.509 digital certificates such as SSL\/TLS certificates, code signing certificates, and S\/MIME email signing certificates.<\/p>\n As far as Comodo S\/MIME certificates go, they like to do things a little differently. They refer to their email signing certificates as Comodo personal authentication certificates, or CPACs. They also offer three types of CPACs to meet the needs of individuals, organizations, and enterprises:<\/p>\nWhat is an S MIME Certificate?<\/h2>\n
\n
How Does an Email Signing Certificate Work?<\/h2>\n
How an S\/MIME Certificate Differs from SSL\/TLS<\/h3>\n
\n
Who or What is Comodo CA?<\/h2>\n