US 11,856,112 B2
System, server device, and storage device
Mika Fujishiro, Kawasaki (JP); Yasuto Aramaki, Kawasaki (JP); Tatsuaki Iwata, Yokohama (JP); Hiromi Sakata, Suginami (JP); Taichiro Yamanaka, Yokohama (JP); and Daisuke Mito, Kawasaki (JP)
Assigned to KABUSHIKI KAISHA TOSHIBA, Tokyo (JP); and TOSHIBA ELECTRONIC DEVICES & STORAGE CORPORATION, Tokyo (JP)
Filed by KABUSHIKI KAISHA TOSHIBA, Tokyo (JP); and TOSHIBA ELECTRONIC DEVICES & STORAGE CORPORATION, Tokyo (JP)
Filed on Aug. 30, 2021, as Appl. No. 17/446,361.
Claims priority of application No. 2020-157427 (JP), filed on Sep. 18, 2020.
Prior Publication US 2022/0094557 A1, Mar. 24, 2022
Int. Cl. H04L 9/32 (2006.01)
CPC H04L 9/3268 (2013.01) 13 Claims
OG exemplary drawing
 
1. A system comprising:
storage devices; and
a server device,
the server device comprising:
a first memory storing first verification information; and
a first processor configured to:
accept a request to transmit a certificate number indicating a number for identifying an erasure certificate;
generate information in which identification information of one of the storage devices from which data is to be erased, a public key, a secret key, and the certificate number are associated with one another;
transmit the certificate number;
verify whether an erasure completion notification transmitted by the one storage device is appropriate by using an authenticator transmitted by the one storage device and the first verification information;
generate, in response to the erasure completion notification being appropriate, the erasure certificate that includes the erasure completion notification transmitted by the one storage device and is signed by using the secret key; and
transmit the erasure certificate, and
each of the storage devices comprising:
a second memory storing second verification information corresponding to the first verification information; and
a second processor configured to:
erase the data; and
transmit the erasure completion notification including the certificate number transmitted by the server device and the identification information, and the authenticator generated by using the second verification information.