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US 10,503,928 B2Granted
Obfuscating data using obfuscation table
Assignee3M Innovative Properties Company
InventorsBrian J. Stankiewicz, Eric C. Lobner, Richard H. Wolniewicz, William L. Schofield
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Abstract
At least some aspects of the present disclosure feature systems and methods for obfuscating data. The method includes the steps of receiving or retrieve an input data stream including a sequence of n-grams, mapping at least some of the sequence of n-grams to corresponding tokens using an obfuscation table, and disposing the corresponding tokens to an output data stream.
Claims19
A method for obfuscating text data using a computer system having one or more processors and memories, the method comprising:
- receiving, by one or more processors, a first data stream of text data comprising a sequence of n-grams;
- obtaining, by the one or more processors, an obfuscation table that maps a set of sensitive n-grams to corresponding tokens, wherein each respective token included in the obfuscation table has no meaning;
- comparing, by the one or more processors, each respective n-gram of the sequence of n-grams received in the first data stream with the set of sensitive n-grams included in the obfuscation table;
- based on the comparison, determining that a particular n-gram of the sequence maps to a corresponding token selected from the tokens included in the obfuscation table;
- based on the determination that the particular n-gram maps to the corresponding token included in the obfuscation table,
- disposing, by the one or more processors, the corresponding token in a second data stream to reduce an amount of sensitive information from the first data stream to the second data stream.
3 more elements
A system for obfuscating data, the system comprising:
- an interface configured to retrieve a first data stream of text data comprising a sequence of n-grams;
- a memory configured to store a portion of the first data stream;
- and
- one or more processors in communication with the memory, the one or more processors being configured to:
- obtain an obfuscation table that maps a set of sensitive n-grams to corresponding tokens, wherein each respective token included in the obfuscation table has no meaning;
- compare each respective n-gram of the sequence of n-grams received in the first data stream with the set of sensitive n-grams included in the obfuscation table;
- based on the comparison, determine that a particular n-gram of the sequence maps to a corresponding token selected from the tokens included in the obfuscation table;
- based on the determination that the particular n-gram maps to the corresponding token included in the obfuscation table, dispose the corresponding token in a second data stream to reduce an amount of sensitive information from the first data stream to the second data stream.
5 more elements
Dependencies are inferred from the claim text.