The eSafe uses so-called EV SSL certificates. All transported data is encrypted and secured with the highest protection. The eSafe relies not only on the SSL protection, but also encrypts particularly critical data (for example user data and password-safe entries) with a session key. This additional encryption helps specifically preventing man-in-the-middle and replay attacks.
For the eSafe Client: The transmission of your data is encrypted in addition to the encrypted SSL connection using a session-specific code.