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1. (WO2018136704) CRYPTOGRAPHY BASED FRAUD TRACKING

Pub. No.:    WO/2018/136704    International Application No.:    PCT/US2018/014361
Publication Date: Fri Jul 27 01:59:59 CEST 2018 International Filing Date: Sat Jan 20 00:59:59 CET 2018
IPC: G06F 11/00
Applicants: EBAY INC.
Inventors: CHAN, Michael J.T.
FIRKE, Nikhil
PALMER, Todd Ryan
DICKSON, Brian Peter
SORIANO, Julien
FORSYTHE, Ralph
Title: CRYPTOGRAPHY BASED FRAUD TRACKING
Abstract:
A cryptographic tracking engine is disclosed that can track a user's data over the Internet in a way that allows the user to maintain control over the data downstream while maintaining the security of the stored data. An online entity provides an identifier that is encrypted using a first mechanism. Further, the user provides a data item for an electronic communication between two users. The data item is encrypted using the first mechanism. The data encrypted using the first mechanism is stored in a cryptographic entry. Other data for the electronic communication between the a first and second user is encrypted using a second encryption mechanism, such as a block cipher. The user can then selectively expose data stored in the cryptographic entry on a block-by-block basis to track exchanges of data over the Internet.