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 40, 56 and 128. A key length of 40-bits
is considered to be relatively insecure, while a key length of 56-bit
is considered moderate and 128-bit keys are considered to be very
secure. If this property returns a value of 0, this means that a
secure connection has not been established with the server.