METHOD AND SYSTEM FOR SECURE DATA SHARING

1 . A method, implemented on a machine having at least one processor, storage, and a communication platform capable of connecting to a network for securely sharing data between a group of data owners, the method comprising:

generating by a data owner, mapping information in accordance with a model;

generating by the data owner, a first data-sketch corresponding to proprietary data associated with the data owner;

transmitting the mapping information and the first data-sketch to other data owners in the group of data owners;

receiving, from each of the other data owners, a second data-sketch corresponding to proprietary data associated with the other data owner, wherein the second data-sketch is generated based on the mapping information; and

processing the first data-sketch and second data-sketches to generate combined data.

2 . The method of claim 1 , wherein each of the first data-sketch and the second data-sketch is a Theta sketch.

3 . The method of claim 2 , wherein the step of generating the first data-sketch further comprises:

computing a hash value for each data element included in the proprietary data associated with the data owner; and

inserting the hash value in the theta sketch based on the hash value being lower than a threshold value associated with the theta sketch.

4 . The method of claim 1 , wherein the step of processing further comprises:

combining the first data-sketch and second data-sketches in accordance with data-sketch set operations to generate the combined data.

5 . The method of claim 1 , wherein the data owner generates the mapping information in response to determining that the data owner is selected to operate as a master data owner within the group of data owners.

6 . The method of claim 1 , wherein each of the other data owners transmits the second data-sketch to all other data owners in the group of data owners.

7 . A non-transitory computer readable medium including computer executable instructions, wherein the instructions, when executed by a computer, cause the computer to perform a method for securely sharing data between a group of data owners, the method comprising:

generating by a data owner, mapping information in accordance with a model;

generating by the data owner, a first data-sketch corresponding to proprietary data associated with the data owner;

transmitting the mapping information and the first data-sketch to other data owners in the group of data owners;

receiving, from each of the other data owners, a second data-sketch corresponding to proprietary data associated with the other data owner, wherein the second data-sketch is generated based on the mapping information; and

processing the first data-sketch and second data-sketches to generate combined data.

8 . The medium of claim 7 , wherein each of the first data-sketch and the second data-sketch is a Theta sketch.

9 . The medium of claim 8 , wherein the step of generating the first data-sketch further comprises:

computing a hash value for each data element included in the proprietary data associated with the data owner; and

inserting the hash value in the theta sketch based on the hash value being lower than a threshold value associated with the theta sketch.

10 . The medium of claim 7 , wherein the step of processing further comprises:

combining the first data-sketch and second data-sketches in accordance with data-sketch set operations to generate the combined data.

11 . The medium of claim 7 , wherein the data owner generates the mapping information in response to determining that the data owner is selected to operate as a master data owner within the group of data owners.

12 . The medium of claim 7 , wherein each of the other data owners transmits the second data-sketch to all other data owners in the group of data owners.

13 . A system for securely sharing data between a group of data owners, the system comprising:

a mapping information generator configured for generating mapping information associated with a data owner in accordance with a model;

a data-sketch generator configured for generating, a first data-sketch corresponding to proprietary data associated with the data owner;

a transmitting unit configured for transmitting, the mapping information and the first data-sketch to other data owners in the group of data owners;

a receiving unit configured for receiving, from each of the other data owners, a second data-sketch corresponding to proprietary data associated with the other data owner, wherein the second data-sketch is generated based on the mapping information; and

a data processing unit configured for processing, the first data-sketch and second data-sketches to generate combined data.

14 . The system of claim 13 , wherein each of the first data-sketch and the second data-sketch is a Theta sketch.

15 . The system of claim 14 , wherein the data-sketch generator is further configured for:

computing a hash value for each data element included in the proprietary data associated with the data owner; and

inserting the hash value in the theta sketch based on the hash value being lower than a threshold value associated with the theta sketch.

16 . The system of claim 13 , wherein the data processing unit is further configured for:

combining the first data-sketch and second data-sketches in accordance with data-sketch set operations to generate the combined data.

17 . The system of claim 13 , wherein the data owner generates the mapping information in response to determining that the data owner is selected to operate as a master data owner within the group of data owners.

18 . The system of claim 13 , wherein each of the other data owners transmits the second data-sketch to all other data owners in the group of data owners.