Electronic data-processing device and system
First Claim
Patent Images
1. An integrated electronic data-processing device, comprising:
- at least one memory storing at least one secret key in encoded form, a processing unit, and a bus connecting said processing unit to said at least one memory;
an encryption and decryption unit connected to said processing unit;
a comparator connected between said at least one memory and said encryption and decryption unit for comparing the stored secret key with a keyword input by a user;
a switching unit connected to and driven by said comparator, said switching unit driving said encryption unit and selectively enabling data to be stored to be encrypted and stored data to be decrypted only upon a positive comparison in said comparator; and
said switching unit passing the keyword input by the user through to said encryption unit for encryption and decryption.
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Abstract
The electronic data-processing device has a processing unit which is connected to one or more memories via a bus. The processing unit has an encryption unit associated with it. One or more secret keys are stored in the one or more memories. All security-related data, and possibly other data as well, are stored in encrypted form in the memory or memories. A comparator compares the stored secret key with a keyword input by a user. The comparator drives a switching unit which in turn drives the encryption unit. Stored data are decrypted only if the comparison is positive.
58 Citations
8 Claims
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1. An integrated electronic data-processing device, comprising:
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at least one memory storing at least one secret key in encoded form, a processing unit, and a bus connecting said processing unit to said at least one memory;
an encryption and decryption unit connected to said processing unit;
a comparator connected between said at least one memory and said encryption and decryption unit for comparing the stored secret key with a keyword input by a user;
a switching unit connected to and driven by said comparator, said switching unit driving said encryption unit and selectively enabling data to be stored to be encrypted and stored data to be decrypted only upon a positive comparison in said comparator; and
said switching unit passing the keyword input by the user through to said encryption unit for encryption and decryption. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification