Secure Printed Memory
AssigneeChengdu Haicun IP Technology LLC
InventorGuobiao ZHANG
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Abstract
Copyright protection for printed memory is more difficult than writable memory. Accordingly, the present invention discloses a secure printed memory. Its printed-memory module stores the same content data for all devices in a same family; its writable-memory module stores different encryption keys for different devices in the same family. Because different devices in the same family are encrypted with different keys, compromising a single device does not compromise other devices in the family.
Claims20
A secure printed memory in a secure printed-memory family, comprising:
- a semiconductor printed-memory module for storing content data, wherein said content data are same for all devices in said secure printed-memory family;
- a semiconductor writable-memory module for storing at least a key, wherein said key is different for different devices in said secure printed-memory family;
- and
- an encryption-circuit module for encrypting said content data in said semiconductor printed-memory module with said key from said semiconductor writable-memory module.
A secure three-dimensional printed memory (3D-P) in a secure 3D-P family, comprising:
- a semiconductor substrate containing transistors;
- a plurality of printed-memory levels stacked above and coupled to said substrate, said printed-memory levels storing content data, wherein said content data are same for all devices in said 3D-P family;
- a writable memory between said printed-memory levels and said substrate for storing at least a key, wherein said key is different for different devices in said 3D-P family;
- and
- an encryption circuit for encrypting said content data in said printed-memory levels with said key from said writable memory.
Dependencies are inferred from the claim text.