History and technology of email encryption

Email Encryption

Encryption 101: Understand how encryption has evolved

Encryption 101: Back to basics

Looking at a few of the oldest known ciphers, which demonstrate the fundamentals of encryption.

Encryption 101: Columnar transposition cipher

This post will focus on a columnar transposition cipher – a slightly more advanced transposition cipher that produces very different results.

Encryption 101: Substitution ciphers

The basic idea of a substitution cipher is a simple one: take one letter in your message, let’s say ‘A’, and replace it with a different letter, such as ‘E’. Sounds familiar?

Encryption 101: The Vigenère cipher

The Vigenère cipher is a polyalphabetic substitution cipher and offers some defence against letter frequency analysis.

Secure, certified end-to-end email encryption

Guard against data breaches with encryption that’s easy-to-use for senders and recipients.