{"id":19387,"date":"2021-12-07T13:18:45","date_gmt":"2021-12-07T13:18:45","guid":{"rendered":"https:\/\/easydmarc.com\/blog\/?p=19387"},"modified":"2025-05-08T21:31:44","modified_gmt":"2025-05-08T21:31:44","slug":"what-is-email-encryption-how-to-encrypt-email-and-how-does-it-work","status":"publish","type":"post","link":"https:\/\/easydmarc.com\/blog\/what-is-email-encryption-how-to-encrypt-email-and-how-does-it-work\/","title":{"rendered":"What is Email Encryption, and How Does it Work?"},"content":{"rendered":"<p><span style=\"font-weight: 400;\">Over the years, email has become the dominant collaboration tool used by businesses and organizations. However, emails aren&#8217;t secure by default. They&#8217;ve always been challenging in terms of security. They&#8217;re sent in plain text, after all. We&#8217;ve talked a lot about email authentication and validation a lot on our blog before. Plus, we offer <a href=\"https:\/\/easydmarc.com\/tools\">tools<\/a> to help you reach email security goals. However, we&#8217;ve not covered how to encrypt email until today.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">So how do enterprises protect sensitive messages sent via email? Well, the answer is simple. Instead of sending out emails as unprotected plain text, entities encrypt their messages before sending.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">But what is email encryption, and how does it work? How can your organization leverage this technology? Find out more below.<\/span><\/p>\n<h2><b>Email Encryption Protocols and How They Work<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">What is the meaning of encrypted email?\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Email encryption is the process of encoding the content of the communication piece to prevent <a href=\"https:\/\/easydmarc.com\/blog\/cyber-threat-actors-and-their-methods-of-attack-module-1\/\">threat actors or unauthorized users<\/a> from accessing your sensitive information. Encryption converts your email to a puzzle that only you and other authorized users can put back together.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Today, there are two primary protocols for email encryption:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Encrypting emails in transit<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">End-to-end email encryption<\/span><\/li>\n<\/ul>\n<h3><b>Encrypting Emails in Transit<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Email providers like Google and Microsoft use Transport Layer Security (TLS) to encrypt emails in transit. This makes it difficult for cyber attackers and unauthorized users to intercept your communication.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Without TLS, cyber hackers can read emails moving from one node to another. These attacks are known as &#8220;man-in-the-middle,&#8221; where hackers hijack the message and pretend to be a legit party in the communication. Such threats can cause immense damage to a business, its reputation, and its professional relationships.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">TLS only protects emails that are in transit. So, cyber attackers can still compromise your email account through phishing. TLS alone doesn&#8217;t provide an adequate level of protection. That&#8217;s why many businesses and organizations consider enterprise email solutions that offer end-to-end email encryption.\u00a0<\/span><\/p>\n<h3><b>End-to-End Email Encryption<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">In end-to-end email encryption, only the Receiver can decode the Sender&#8217;s encrypted email. These emails are secure and unreadable by email servers, making it difficult for cyber actors to compromise.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">This encryption protocol uses a key to encode and decode the message. Each party has a public and private key. The Sender uses the public key to encode the email before sending, while the recipient uses the private key to decode it.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Now, are you asking how to open an encrypted email? To do it, you need two types of encryption keys (alphanumeric strings). The Sender encodes the message using the Receiver&#8217;s public key. On the other end, the Receiver can open the message only if they have the private key of the Sender.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">While end-to-end email encryption is the best option for data security, you can implement the algorithm in many ways. Most organizations deploy end-to-end encryption using Secure Multi-Purpose Internet Mail Extension (S\/MIME) and Pretty Good Privacy (PGP).<\/span><\/p>\n<h4><b>Pretty Good Privacy (PGP)<\/b><\/h4>\n<p><span style=\"font-weight: 400;\">PGP uses a hybrid approach. It&#8217;s an end-to-end encryption method that uses symmetric encryption, adding a layer of encryption on the public key itself. Here is how to encrypt an email using PGP:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">The Sender wants to send an encrypted email to the Receiver<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">The Receiver generates public and private keys<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">The Receiver sends the public key to the Sender<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">The Sender encodes the email using the Receiver&#8217;s public key<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">The Receiver decodes the email with the Sender&#8217;s private key<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Though Pretty Good Privacy is secure, it does come with some challenges. One significant obstacle is that public keys management is challenging for end-users. This is because they&#8217;re responsible for sending their public keys to people they want to communicate with.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">In the case of device loss, the PGP user has to exchange public keys with their contacts all over again.<\/span><\/p>\n<h4><b>Secure Multi-Purpose Internet Mail Extension (S\/MIME)<\/b><\/h4>\n<p><span style=\"font-weight: 400;\">Secure Multi-Purpose Internet Mail Extension is another end-to-end encryption protocol. Unlike PGP, S\/MIME encrypts your email messages using digital certificates provided by the certificate authority (CA). Also, S\/MIME uses a digital signature to find out the origin and authenticity of the message.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">One issue with S\/MIME is that the protocol isn&#8217;t available for web-based email clients such as Google, and it&#8217;s inaccessible via a web portal. S\/MIME also lets users store the public keys on a server, which cyber actors can compromise.\u00a0<\/span><\/p>\n<h2><b>Here&#8217;s Why Email Encryption is Important<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">\u00a0Email continues to be one of the predominant <a href=\"https:\/\/getvoip.com\/blog\/what-is-cpaas\/\" target=\"_blank\" rel=\"noopener\">communication platforms<\/a> among organizations and businesses. Understanding how to encrypt email is highly important, especially if you handle confidential information. Here are some reasons why.\u00a0<\/span><\/p>\n<h3><b>Safeguard Confidential Information<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Organizations use electronic communication tools when discussing sensitive matters such as company secrets, personal information, contract papers, and other business assets. These documents and exchanges require confidentiality. Leaked information falling into the wrong hands can be damaging.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Unencrypted emails can be read and altered. As a result, cyber actors can compromise your information and use it for nefarious purposes. To avoid leakage of confidential information, knowing how to encrypt your email is essential.\u00a0<\/span><\/p>\n<h3><b>Avoid Identity Theft<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Suppose a hacker gets hold of your email password and username. In that case, they can read your messages and send fallacious communications on your behalf. This kind of identity theft often involves intercepted business or financial transactions. It&#8217;s best to avoid such threats by using email clients with built-in encryption.\u00a0<\/span><\/p>\n<h3><b>Email Repudiation<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Hackers can easily forge regular emails, and you can never prove who sends them or their authenticity. This inability to show the true origin of a fake email poses severe risks for business communications. Email encryption helps prevent such scenarios with a process called non-repudiation. It offers proof of the integrity and origin of data.<\/span><\/p>\n<h2><b>What&#8217;s Our Say<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">Sensitive and private organization emails such as company secrets, passwords, and client information are popular targets for hackers. Confidential information is a gold mine for such imposters. At the same time, stolen identities and fraudulent emails represent countless opportunities for cybercriminals.\u00a0\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Email security has become essential for small and large businesses to mitigate such risks. Organizations should invest in well-rounded and secure email encryption software. This will protect their internal data, private documents, and business communications.<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Over the years, email has become the dominant &#8230;<\/p>\n","protected":false},"author":5,"featured_media":19388,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[204,203],"tags":[],"class_list":["post-19387","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","category-email-security"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.3 (Yoast SEO v27.3) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>What is Email Encryption, and How Does it Work? | EasyDMARC<\/title>\n<meta name=\"description\" content=\"Are you concerned about your email security? 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