MS Explorer and Cipher Strength detection How can one detect the cipher strength of a browser from JavaScript?

Alessandro A. Garbagnati

I don't think you can get that type of information throught simple javascript. There must be a way to access to some Internal Explorer internal information, but I'm afraid that in that case you need to have something like ActiveX objects.
There are many ssl web servers that provides information about the encryption and the strength throught CGI variables. For example, with Apache-SSL you have:
HTTPS_KEYSIZE (bits in the session)
HTTPS_SECRETKEYSIZE (bits in the key)
and so on (eventually check here for extra info).

Unfortunately, for security issues, either CGI variables cannot be accessed directly from Javascript. Probably, you can, from a dynamic page (perl, jsp, asp, ecc.), find ways to provide all those info to the javascript code.