Careful Selection of the E‑Mail Mailbox Provider

Secure Encryption for Dispatch and Storage

You entrust everything to your e‑mail inbox: You use it to receive new passwords and some business partners send you confidential documents unencrypted. You store contact details and other personal information in the associated address book. None of this should fall into the wrong hands!

Unfortunately, end-to-end encryption (E2EE) has still not caught on with the general public. Mails are usually sent unencrypted if the sender and recipient use different providers. Even then, a secure mailbox provider makes sense because your emails are at least stored securely encrypted after receipt.

Here I present a provider that does the complicated encryption for customers. I initially listed two other mailbox providers, but unfortunately these use the outdated PGP encryption standard, which has a number of weaknesses.

Introduction: Tutao

Tutao GmbH was founded in November 2011 and has been on the market with its product Tutanota since March 2014.
The Tutanota brand was renamed Tuta on 7 November 2023.
Tuta is ideally suited for both private and business use and is the only provider of an end-to-end encrypted contact form for website operators!

Why no more Recommendation for Mailbox Providers with PGP?

Current encryption standards like PGP and S/MIME have weaknesses which Tuta avoids.

These standards do not support Perfect Forward Secrecy (PFS) and are not resistant to quantum computers.

Furthermore, the subject of e‑mails should be encrypted. Therefore, the Tuta team has developed a solution based on recognized algorithms (RSA and AES) that automatically encrypts subject, content and attachments.
In the future, it is planned to replace these algorithms with quantum-resistant algorithms.

More facts about Tuta on the next page …


Blog by Matthew Green, cryptographer and professor at Johns Hopkins University, Baltimore, Maryland, USA

Keyword list: AES, Blog, Details, E-Mail, E2EE, End-to-end encryption, IT, Mailbox, PFS, PGP, Providers, Service, Storage, Tutanota, Website, why

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