US 12,189,818 B2
Data storage device and method for token generation and parameter anonymization
Ramanathan Muthiah, Bangalore (IN)
Assigned to Sandisk Technologies, Inc., Milpitas, CA (US)
Filed by Western Digital Technologies, Inc., San Jose, CA (US)
Filed on May 4, 2022, as Appl. No. 17/736,378.
Prior Publication US 2023/0359766 A1, Nov. 9, 2023
Int. Cl. G06F 21/62 (2013.01)
CPC G06F 21/6254 (2013.01) 20 Claims
OG exemplary drawing
 
1. A data storage device comprising:
a memory; and
a processor configured to:
receive, from a host, a logical address and data comprising a plurality of data portions in a non-anonymized form, wherein the host transmits a non-anonymized version of the data to the data storage device for storage;
receive, from the host, a plurality of tokens, wherein each token of the plurality of tokens identifies a different set of the data portions to anonymize;
create a plurality of anonymized versions of the data per the plurality of tokens;
store the plurality of anonymized versions of the data in a respective plurality of different physical addresses in the memory;
create a one-to-many logical-to-physical address entry that maps the logical address to the plurality of different physical addresses, wherein each different physical address is indexed by a respective one of the plurality of tokens;
receive a request to read the logical address, wherein the request comprises one of the plurality of tokens;
use the one-to-many logical-to-physical address entry and the one of the plurality of tokens to determine which of the different physical addresses to read;
read the anonymized version of the data stored in the determined physical address; and
send the read anonymized version of the data in response to the request.