METHOD AND SYSTEM FOR CALCULATIONS ON ENCRYPTED DATA
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United States of America Patent
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Issued Date -
Oct 30, 2014
app pub date -
Apr 29, 2013
filing date -
Apr 29, 2013
priority date (Note) -
Abandoned
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Abstract
A method and device for generating a communal decryption key among participants to permit sharing of sensitive data, the method at a current participant includes generating a secret value; adding the generated secret value to an in progress key to create a modified in progress key; and forwarding the modified in progress key to a subsequent participant in accordance with a predetermined ordering of participants, over a predetermined number of rounds. Further a method for sharing of sensitive data among participants, the method at a current participant includes constructing an exponent by combining a secret value of the current participant and the sensitive data; creating an encrypted value using the constructed exponent; publishing the encrypted value; finding a product of encrypted values of all participants; and decrypting the product of encrypted values using a communal decryption key, wherein the communal decryption key includes secret values of all the participants.
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