The security vulnerabilities went around the world under the name EFAIL. In 2018, security researchers bypassed the encryption of email systems and published details about security vulnerabilities in the two encryption methods PGP and S/MIME. If one day someone gets access to your private key, they will be able to read all encrypted emails in plain text - even decades later. the respective end points of the communication) can decrypt the messages. This generally promises a high level of security.įor technical reasons, so-called metadata such as sender, recipient and the subject of the message cannot be encrypted. Since only the communication partners (i.e. It is a so-called "end-to-end encryption" (E2EE).
The text of an email is very secure with PGP. This means that the transmission is done via public servers and can be copied anywhere. The transport of the email from the mail server to the email client of the recipient is then usually TLS-secured via IMAP or POP3. The email is then routed over an unknown number of servers until it arrives at the recipient's destination server. How are PGP encrypted emails transported?Īfter the email has been encrypted in the sender's e-mail client, the transmission is usually TLS-secured (Transport Layer Security) to the outgoing mail server using SMTP (Simple Mail Transfer Protocol). This allows your recipients to check whether the email really comes from you and to be sure that it has not been manipulated. The email is provided with a digital signature based on your private key. In addition to email encryption, you can sign your emails.
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The private key is stored with a password so that it still remains protected, even in case of publication. With this private key only you can decrypt what others have sent you encrypted with your public key. The private key is top secret and must only be available to you. The more people know your public key, the more likely they are to send you emails encrypted.
The public key is available for anyone on the internet and can be used to send encrypted emails to you. You should send your public key to all communication partners and publish it on so-called public key servers. These keyservers are public machines where you can search for public keys of email addresses. Our add-in makes it possible to communicate ad-hoc bidirectionally without the installation of software on the client side, without the exchange of certificates, without the creation of user accounts and even without any previous knowledge.Ĭryptshare represents an interesting alternative to traditional email encryption solutions and is consistently designed for user-friendliness, which leads to very high user acceptance.Īn encryption software like PGP ("Pretty Good Privacy") creates a key pair.Ī public key and a private key. We have recognized this problem and have designed a solution right from the start that takes a different approach without this complexity. Once you have understood these terms and successfully mastered the time-consuming process of implementing traditional email encryption methods, you will probably start looking for alternative methods to encrypt emails. However, as soon as you start dealing with the topic of email encryption, you will immediately be confronted with terms such as "private key", "public key", "certificates", "signing", "S/MIME", "PGP", "revocation certificate" and many more. It makes sure that the contents of the email cannot be read by third parties during transmission. If you want to ensure that the information in emails is secure from sender to recipient's mailbox, you need email encryption.