What Is Email Encryption?

With the development of computers, the protection of e-mail has become more comprehensive. The core idea of email encryption is to encrypt emails. This method allows specific people to read them, thereby ensuring the security of the information.

Symmetric encryption

The advantages of symmetric encryption technology are open algorithm, small calculation amount, fast confidentiality, and high encryption efficiency. The disadvantage is that the same key is used, the security type is low, and it is easy to leak. The advantage is that it can ensure the authenticity and non-repudiation of the identity. The disadvantage is that the key management is complicated and the CA certificate is more troublesome. The advantage of the link encryption technology is that it is fast and secure. The cost is high; the advantage of identity-based password encryption technology is that no certificate is needed, the recipient's public key is from his identity information, and the key has a lifetime, so it does not need to be revoked, and it can resist spam attacks The disadvantage is the need for a centralized server, which increases the security risk of a leak. ^[1]