How to send a secure email attachment using encryption

If yous demand to send sensitive or private data via electronic mail, information technology is vital that you encrypt those files to ensure that they cannot exist intercepted or accessed past your electronic mail provider.

Regular email attachments are unprotected, which means that they are delivered in a potentially accessible country. As a effect, you must secure your attachments using end-to-end encryption if you want to gain acceptable privacy levels.

Whether you are emailing sensitive personal information, business concern data, or annihilation else that you want to keep secure and individual, knowing how and why to send secure email attachments is crucial. In this guide, we volition hash out the primary methods for sending them securely, and teach you everything y'all need to know to begin protecting your attachments so that they can simply ever be accessed by their intended recipient.

What kind of electronic mail data needs to exist secured?

People have a multitude of reasons for wanting to send secure email attachments. Personal and private data of a sensitive nature should not sit down effectually on company servers in plain text, because this results in the potential for data leaks or breaches. The same is true of important personally identifiable information, IDs, payment details – and anything else that tin potentially exist leveraged to appoint in fraud or identity theft.

Businesses also frequently need to send secure email attachments either to protect sensitive business information or to communicate consumer-related information in such a manner that it is secure and compliant with data privacy regulations. This includes things similar names, addresses, payment details, intellectual belongings, R&D data, and anything else that the company needs to communicate in such a way that it remains completely individual and secure.

What is end-to-end encryption?

End-to-cease encryption is a form of encryption that ensures your data is securely scrambled to brand it inaccessible to everyone but the sender and the recipient. This type of encryption happens locally on your machine so that the data is already secure when it is transported over the cyberspace. This ensures that the data cannot be intercepted, and is not available to anybody – whether in transit or when information technology is received by the recipient's e-mail provider.

End-to-end encryption (E2EE) works past encrypting the attached data with a key that is just known to the sender and the recipient. Without this primal, the information in the attachment is an indecipherable brew of data, meaning that any is independent within the zipper is completely prophylactic and private.

The bully matter about this kind of encryption is that yous don't need to worry almost cybercriminals attacking your email provider's servers. Because, fifty-fifty if they practice, your private information is already secure.

In addition, E2EE protects your information against being snooped on past the e-mail visitor itself, which are known to sometimes analyze the contents of e-mail inboxes (and potentially even share that information with tertiary parties) for marketing reasons or for purposes of developing new products and services.

Finally, terminate-to-finish encryption ensures that your emails are safe against the potential of authorities surveillance. By encrypting your data with E2EE, it is incommunicable for the email provider to give the authorities access to the individual contents of your emails, even if it is approached with a warrant.

How practise you ship an encrypted email attachment?

There are a number of unlike ways to send secure email attachments that are completely private. Below, we will have a look at the various different methods that are available. It is worth noting that the method that is bachelor to you will depend on which email provider you utilise. Not all electronic mail providers are the aforementioned, and not all provide the means for using all of the methods below.

S/MIME

The most common method for sending encrypted email attachments is to utilize an Southward/MIME document (Secure/Multipurpose Cyberspace Postal service Extensions). This kind of encryption leverages public-cardinal (asymmetric) cryptography, which requires both a public encryption key and a private one known but to the recipient and sender.

This type of encryption relies on a trusted third political party to cosign the digital identity of the sender and the recipient, which ensures that the two entities are who they claim to be. To enable this, the organization uses a digital certificate, which is validated past an external Document Dominance to ensure that the sender and recipient are who they claim to exist.  This prevents email spoofing and fights against the threat of phishing.

When sending a secure email attachment using S/MIME, the sender and recipient must both have an S/MIME document installed on their email client. The sender then uses their intended recipient's public primal to encrypt the email and transport it over. The recipient's email client then decrypts the electronic mail using the private central.

The drawback of S/MIME is that it can and will simply work if both the sender and recipient have an S/MIME document installed and enabled on their client. As a result, if you e-mail a recipient who uses a different platform that doesn't implement S/MIME your email may not exist secure.

To transport an email encrypted with S/MIME follow the steps below:

1. Create a new electronic mail and make full in the usual details, the recipient, bailiwick line, write your message, and add the zipper.
2. Select Options in the electronic mail client and choose Encryption (this will vary according to your email client)
3. Click Encrypt with S/MIME.
4. Transport the email

PGP

PGP stands for Pretty Good Privacy, and it has been around since mode back in 1991. Information technology is an encryption system that has get near people'south preferred standard for sending encrypted emails.

OpenPGP (an open-source standard of PGP encryption software) is now considered the gilt standard for sending secure emails. It uses both symmetric and public-key cryptography (asymmetric encryption) to provide users with a mode to transport secure email attachments.

The benefit of PGP's hybrid cryptographic system is that it permits internet users who have never actually met to send encrypted messages to i another without the need to exchange private encryption keys.

However, it is worth noting that every bit PGP evolves within email clients to support newer features and algorithms this tin lead to compatibility issues. As a event, it is vital that both senders are recipients are aware of the other's PGP settings and take ensured that they are gear up to successfully send each other securely encrypted emails.

A major benefit of PGP is that it can provide both message authentication and integrity checking. This allows the authenticity of the sender to be validated and allows the email client to check that an electronic mail has not been tampered with since information technology was encrypted and sent.

Finally, it'due south worth mentioning that in order to send each other PGP encrypted emails, internet users often publish a PGP fingerprint publicly either online or via other means such as on a business carte du jour.

This allows a potential sender to validate that the hash of the public key they take downloaded is the correct PGP Primal for their intended recipient, and is a adept way to facilitate the receipt of encrypted emails from previously unknown contacts and sources.

How to send a PGP encrypted email:

The easiest style to send a PGP encrypted e-mail is for you and your contact to subscribe to a reliable, secure email provider like ProtonMail. That said, you can easily ship PGP encrypted emails using any email service past post-obit the steps below:

1. Download and install the third-party email client Mozilla Thunderbird (it is complimentary and volition work with all popular email services).
2. Set your existing email business relationship to work with Thunderbird.
3. Download and install GNU Privacy Guard. GnuPG lets y'all encrypt and sign your data to transport encrypted emails using OpenPGP.
4. Download Enigmail and add it to Thunderbird (Thunderbird menu Tools > Addons). This software allows you to send encrypted emails and electronic mail attachments using GnuPG.
5. Get your PGP keys: open up Thunderbird, then go to Enigmail/p=p bill of fare > Select Key Direction

You lot are now ready to start sharing your PGP fingerprint (public key) to allow people to send you PGP encrypted emails! Alternatively, you lot tin can use somebody's public central to transport them an encrypted email.

Symmetric encryption

This type of encryption relies on sharing the encryption key with your intended recipient, which ways that you must discover a way to securely share that password with your contact so that they will be able to decrypt the attachment in one case they receive it.

The most secure form of symmetric encryption is AES-256. Everyone wanting to encrypt data before they electronic mail it tin can choose to do it themselves using symmetric encryption by zipping up the document, file, or folder upwards on their computer with a countersign.

In one case the file has been zipped up in a countersign-protected archive, you tin so upload it as an attachment to your e-mail. This method ensures that the password must be shared with your intended recipient and volition be needed to decrypt the contents of the zipped annal to proceeds access to its contents.

Alternatively, you could use the first-class encryption tool NordLocker to encrypt your data and send information technology to a contact countersign protected. Nordlocker allows you to encrypt any of the data on your computer, which yous can then upload in an encrypted land equally an attachment to your email customer.

NordLocker even has a 'cloudlocker' feature with cloud storage infinite that you tin can use to back up your data in a completely individual and secure style. You can find out more in our NordLocker review. Or click the link below to caput over to NordLocker and download this superb encryption and backup tool for free.

Endeavor NordLocker for free!

Choose a secure electronic mail provider that has strong E2EE encryption

If yous want to transport emails and e-mail attachments that are protected using reliable encryption such as PGP, the best option is to get an email account with a secure email provider that has a focus on privacy and security.

There are a number of market leading email providers on the market that put privacy and security first, and by subscribing to one of these services, y'all will have fully integrated means to send encrypted emails and attachments to your contacts in the easiest fashion possible.

For more data on choosing an email provider that comes set up upwardly natively to apply encryption to emails and attachments head over to our well-nigh secure email providers commodityor check out our e-mail provider reviews and guides for more details.

Ultimately, picking an electronic mail provider that promises to go out the contents of your emails alone in its privacy policy and that provides the means for sending encrypted emails and e-mail attachments natively inside its client will provide a much improve feel for anybody who wants to send private and secure emails.

How to send a secure email attachment using Gmail

Google has been promising to provide end-to-stop encryption for emails for many years, but it hasn't done so nonetheless. Equally a result, you will demand to use a tertiary-party extension such as Mailvelope to transport a secure email attachment to your intended recipient using E2EE.

The good news is that Mailvelope (and other third-political party solutions) are available for free. These extensions can be installed and used with your existing Gmail account to ship encrypted email attachments using PGP (as long as both the sender and recipient have PGP set upwardly and enabled in their email client.

If yous want to download and begin using an extension to secure your emails and electronic mail attachments with encryption using Gmail, you can practice then by post-obit the steps below:

1. Download the email encryption extension that yous want from the Chrome spider web store (we have recommended a few below).
2. Compose your electronic mail message in Gmail.
3. Attach your document to the e-mail using the encryption extension.
4. Customize the security settings using the extension (you can choose which recipient should receive access, set permissions, and even add a watermark to allow for tracking and identification, for case). Depending on which extension you use, you may also be able to specify a date when the document will automatically expire.
5. Insert the secure Gmail zipper into the email as a link and send.

Extensions for encrypting Gmail emails and attachments:

• Mailvelope
• FlowCrypt
• Lockmagic
• SendSafely
• Snapmail

Source: https://proprivacy.com/email/guides/send-secure-email-attachments