A secure communication circuit for use with a data communication interconnect adapter and method of operation thereof. The secure communication circuit includes a first data buffer coupled to a data input terminal, an encoder/decoder coupled to the first data buffer, a second data buffer coupled to the...http://www.google.com.tw/patents/US6775274?utm_source=gb-gplus-share專利 US6775274 - Circuit and method for providing secure communication over data communication interconnects