The Encryption property returns a string which specifies the
security protocol and cipher suite selected for a secure connection.
For example, a typical value for a secure connection would be
"TLS 1.3 (AES_256_GCM)" and can be used for
logging and diagnostic purposes. If the connection is not secure, this
property will return an empty string.
The information returned reflects the most recent navigation state.
During navigation, these values may be provisional. For example, a
page may initially appear secure but later be downgraded to a warning
state if mixed content is detected. Applications should not consider
this value definitive until a NavigationCompleted event
occurs.
For information about the TLS certificate provided by the server,
use the Certificate property.