Anonymity measuring device
First Claim
1. A data anonymity measuring device for selectively transmitting an anonymized database to a third party comprising:
- a calculation unit (402), implemented by a processor and coupled to at least one memory (204, 206), the memory storing an original database and said anonymized database separate and distinct from the original database, said calculation unit arranged to calculate conditional entropy (h(s)) for each entry in said anonymized database according to;
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Accused Products
Abstract
The invention concerns a data anonymity measuring device for selectively transmitting an anonymised database to a third party comprising: calculation means (402) coupled to at least one memory, the memory storing an original database (204) and said anonymized database (206), said calculation means arranged to calculate the conditional entropy for each entry in said anonymized database based on entries in said original database; comparing means (406) arranged to compare at least one of said conditional entropies with a threshold value; and output means (410) arranged to transmit said anonymized database based on the result of said comparison.
52 Citations
8 Claims
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1. A data anonymity measuring device for selectively transmitting an anonymized database to a third party comprising:
a calculation unit (402), implemented by a processor and coupled to at least one memory (204, 206), the memory storing an original database and said anonymized database separate and distinct from the original database, said calculation unit arranged to calculate conditional entropy (h(s)) for each entry in said anonymized database according to; - View Dependent Claims (2, 3, 4)
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5. A method for selectively transmitting an anonymized database to a third party, the method comprising:
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for each entry in said anonymized database, determining conditional entropy by calculating cumulative entropy (h) according to;
h=h−
P(ra|Sb)log2 P(ra|Sb)wherein ra is a currently processed entry in the original database, sb is the currently processed entry in the anonymized database, wherein the anonymized database is separate and distinct from an original database; comparing at least one of said conditional entropies with a threshold entropy value; and selectively transmitting said database to said third party based on the result of said comparison. - View Dependent Claims (6, 7)
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8. A processor-readable, non-transitory storage medium having stored thereon executable instructions that, when executed by processor, cause the processor to:
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for each entry in an anonymized database, determine conditional entropy by calculating cumulative entropy (h) according to;
h=h−
P(ra|Sb)log2 P(ra|Sb)wherein ra is a currently processed entry in the original database, sb is the currently processed entry in the anonymized database, wherein the anonymized database is separate and distinct from the original database; comparing at least one of said conditional entropies with a threshold entropy value; and selectively transmitting said database to a third party based on the result of said comparison.
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Specification