Invention Grant
- Patent Title: Data security system that uses a repeatable magnetic signature as a weak entropy source
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Application No.: US15248738Application Date: 2016-08-26
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Publication No.: US10341115B2Publication Date: 2019-07-02
- Inventor: William Erik Anderson , Jiangnan Lin , Xiong Liu , Quan Li
- Applicant: Seagate Technology LLC
- Applicant Address: US CA Cupertino
- Assignee: Seagate Technology LLC
- Current Assignee: Seagate Technology LLC
- Current Assignee Address: US CA Cupertino
- Agency: Hall Estill Attorneys at Law
- Main IPC: H04L29/06
- IPC: H04L29/06 ; H04L9/32 ; G06F3/06 ; G06F21/00 ; G11B20/00 ; G11B19/02

Abstract:
Apparatus and method for data security in a data storage device. In some embodiments, an alternating pattern is written to a magnetic recording medium as a sequence of symbols at a selected clock rate. A repeatable magnetic signature is generated by reading the alternating pattern from the medium, the magnetic signature having relatively weak entropy at boundaries of the symbols. A multi-bit digital sequence is extracted from the repeatable magnetic signature, the digital sequence having relatively strong entropy. The digital sequence is stored in a separate memory coupled to the medium. Access to data stored on the medium is authenticated responsive to the digital sequence stored in the separate memory.
Public/Granted literature
- US20180062850A1 Data Security System That Uses a Repeatable Magnetic Signature as a Weak Entropy Source Public/Granted day:2018-03-01
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