Control system for protecting external program codes
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United States of America Patent
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-
N/A
Issued Date -
Jan 22, 2004
app pub date -
Dec 27, 2002
filing date -
Jul 19, 2002
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
The present disclosure discloses a control system for protecting external program codes, which can prevent the program codes of an external ROM from being leaked by encrypting address signals and data codes. The control system for protecting the external program codes includes an external ROM configured to store the program codes, and a micro-controller configured to read and to process the program codes from the external ROM. The external ROM stores the encrypted program codes, and the micro-controller decrypts and uses the encrypted program codes from the external ROM. Here, the micro-controller reads the program codes from the external ROM and uses encrypted address signals. The external ROM stores reordered program codes according to the encrypted address signals.
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