Hi,

The TLS-WG is discussing a method to prevent a fallback attack in TLS. [1]

"Sad as it is, in order to work on public Internet all browsers
implement TLS fallback: in the event of a handshake failure they will
retry the connection with a lesser SSL/TLS version."

The proposed solution is complex and requires protocol changes.

A different solution is to pin the TLS version to the host. Once the TLS
version is
pinned any downgrade attack to a lower TLS version would fail.

This feature could be optional or mandatory to be configured on the host.

Please discuss. Opinions welcome.


regards,

ralf

[1] http://www.ietf.org/mail-archive/web/tls/current/msg10676.html
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