The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 12, 1991
Filed:
Nov. 16, 1989
Steven C Taylor, Hillsborough, CA (US);
Verilink Corporation, San Jose, CA (US);
Abstract
A ciphertext to plaintext communications system including a communications channel, a generator, a data device, an encryptor, a black to red communicator (BRC) device, a decryptor, and a comparator. The generator generates a first data-bit sequence which has a predetermined bit pattern. The encryptor encrypts the first data-bit sequence as an encrypted-bit sequence. The encrypted-bit sequence is transmitted over the communications channel and received by the BRC device. The data device generates the second data-bit sequence, which may include data from diagnostic equipment or any other source of information originating in the channel carrying the encrypted-bit sequence. The BRC device modifies the encrypted-bit sequence using the second data-bit sequence. The decryptor decrypts the modified-encrypted-bit sequence as a third data-bit sequence. The third data-bit sequence is compared with the predetermined bit pattern with the comparator, which thereby generates the second data-bit sequence.