H - Electricity – 03 – M
Patent
H - Electricity
03
M
354/67
H03M 7/30 (2006.01) H03M 7/00 (2006.01)
Patent
CA 1271261
ABSTRACT OF THE DISCLOSURE A first data processing system sends a message to a second data processing system via a modem. A processor of the first data processing system executes the instructions of an encoding algorithm stored in a memory of the first data processing system thereby encoding the characters of the message as the message is sent from the first system to the second system. The processor, in conjunction with the encoding algorithm, encodes the characters of the message by locating unacceptable characters among the acceptable characters in the message, the unacceptable characters possessing more than one meaning and triggering the execution of a function other than the intended function. The acceptable characters do not possess any alternative meanings. A bias code is selected for the acceptable characters and a further bias code is selected for the unacceptable characters. The unacceptable characters are converted into modified acceptable characters. The bias code, acceptable characters, further bias code, and modified acceptable characters are transmitted from the first data processing system to the second data processing system. The second system interprets the bias code to mean that the acceptable characters should be accepted without alteration, but interprets the further bias code to mean that the modified acceptable characters should be re-converted into the original unacceptable characters. Since the second system received the unacceptable characters in modified acceptable character form, only the intended function of the character will be executed.
528996
International Business Machines Corporation
Kerr Alexander
Larson Lawrence E.
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