Techniques are provided for improvement of the modulo-26 Hill system that encrypts a limited character set in blocks of two, and for expanding its original polygraphic capability into a polygraphicpolymorphic modulo-256 system to be known as the Scrambler system. In one aspect of the invention, an amplifier includes at least one signal amplifying transistor, coupled between an input terminal and an output terminal associated with the amplifier, for amplifying a received input signal. This headwear can be used alone or under protective headgear, for example beneath a hockey helmet. And a bonding pad is put in order and located along the long-side direction of a second metal to achieve the above objects. An identical synchronization signal is added to both halves of the encoded vector.