发明名称 |
PROCESS AND DEVICE FOR THE PROTECTION OF SOFTWARE |
摘要 |
In this method for protecting software stored in a memory from being copied, the commands and/or data are supplied on request to a microprocessor and during this process are recoded or converted. To make copying more difficult, it is provided that the type of recoding of at least one interrogated command and/or data byte is modified in dependence on at least one preceding interrogated command and/or data byte. An arrangement for protecting software stored in at least one command and/or data memory is characterised by the fact that the recoding function of the recoder can be modified for at least one command and/or data byte following at least one incoming command and/or data byte recoded in the manner intended. <IMAGE> |
申请公布号 |
AU587852(B2) |
申请公布日期 |
1989.08.31 |
申请号 |
AU19860061706 |
申请日期 |
1986.08.21 |
申请人 |
NOVOMATIC AUTOMATENINDUSTRIE-UND-HANDELSGESELLSCHAFT M.B.H. & C |
发明人 |
EDMUND SCHOBITZ |
分类号 |
G06F1/00;G06F21/00;(IPC1-7):G06F12/14 |
主分类号 |
G06F1/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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