Title:
外部記憶装置及び情報漏洩防止方法
Document Type and Number:
Japanese Patent JP4933946
Kind Code:
B2
Abstract:
Proposed is an apparatus and method of preventing the leakage of information from an external storage apparatus (100A, 100B) even when such external storage apparatus is stolen or accessed from an unauthorized host computer. This external storage apparatus accessible from a host computer or another external storage apparatus via a network encrypts or decrypts data written from a host computer (120A, 120B) to be stored in the storage area, sends a request for existence confirmation to the host computer or the other external storage apparatus every predetermined period of time, and zeroizes an encryption key to be used in the encryption calculation for encrypting or decrypting data to be performed by the encryption calculation unit based on the result of a response from the host computer or the other external storage apparatus in reply to the request.
Inventors:
Kenji Fujii
Daisuke Kito
Kitamura Manabu
Daisuke Kito
Kitamura Manabu
Application Number:
JP2007108835A
Publication Date:
May 16, 2012
Filing Date:
April 18, 2007
Export Citation:
Assignee:
株式会社日立製作所
International Classes:
G06F3/06; G06F12/00; G06F21/60; G06F21/62; G06F21/80
Domestic Patent References:
| JP2004280551A | ||||
| JP2006344073A | ||||
| JP2005134947A | ||||
| JP2002351744A | ||||
| JP2006093849A |
Foreign References:
| WO2000017731A1 | ||||
| EP1441275A1 | ||||
| WO2006009158A1 |
Attorney, Agent or Firm:
Shinji Oga