The CipherStrength property returns the number of bits in
the key used to encrypt the secure data stream. Common values
returned by this property are 128 and 256. A key length of 40-bits
or 56-bits is considered to be insecure, and suject to brute
force attacks. 128-bit and 256-bit keys are considered secure.
If this property returns a value of 0, this means that a
secure connection has not been established with the server.