发明名称 |
AUTOMATICALLY GENERATED CRYPTOGRAPHIC FUNCTIONS FOR RENEWABLE TAMPER RESISTANT SECURITY SYSTEMS |
摘要 |
<p>A secure cryptographic function is generated from a template containing static program code that is the same for all mobile agents and dynamic program code which differs for each function. The dynamic code implements a stream cipher encryption algorithm that is used to encrypt messages processed by the function. The dynamic code may also generate a message digest that is attached to each message. The message digest may be a hash function applied to the dynamic code and, optionally, to the message. Each function may be assigned a limited lifetime, either by assigning it a fixed termination time, a maximum number of messages that it may send or, if the cryptographic function is used with a mobile agent, a maximum number of hosts that it may visit. Any received messages that have been processed by the encryption algorithm after the expiration of its lifetime are ignored.</p> |
申请公布号 |
EP1556993(A2) |
申请公布日期 |
2005.07.27 |
申请号 |
EP20030811468 |
申请日期 |
2003.10.27 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
PERKINS, GREGORY, M.;HE, ZHIJUN |
分类号 |
G06F;G06F1/00;G06F12/14;G06F15/00;G06F21/00;H04L9/14;H04L9/18;(IPC1-7):H04L9/18 |
主分类号 |
G06F |
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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