Title:
Detection of an invalid escrow key
Document Type and Number:
Japanese Patent JP6046745
Kind Code:
B2
Abstract:
A secure hash, such as a Hash-based Message Authentication Code ("HMAC"), is generated using a piece of secret information (e.g., a secret key) and a piece of public information specific to each escrow key (e.g., a certificate hash or public key). Using the secret key ensures that escrow key validation data can only be generated by knowing the secret key, which prevents an attacker from generating the appropriate escrow key validation data. Using the certificate hash as the public data ties each escrow key validation data to a particular certificate, thereby preventing the attacker from simply copying the validation data from another escrow key. Any escrow key that is found to be invalid may be removed from the file container and a system audit log may be generated so that a company, individual, or other entity can be aware of the possible attempt at a security breach.
Inventors:
Renga Natan, Ven Katalaman
Carver, Brian Thomas
Jump, daniel brown
LeBlanc, David Charles
Weiss, Samuel Ira
Carver, Brian Thomas
Jump, daniel brown
LeBlanc, David Charles
Weiss, Samuel Ira
Application Number:
JP2014552276A
Publication Date:
December 21, 2016
Filing Date:
January 10, 2013
Export Citation:
Assignee:
MICROSOFT CORPORATION
International Classes:
H04L9/14; G06F21/62
Domestic Patent References:
| JP2000267565A | ||||
| JP2001516913A | ||||
| JP2008295008A |
Attorney, Agent or Firm:
Shinjiro Ono
Yasushi Kobayashi
Shigeo Takeuchi
Osamu Yamamoto
Ryota Suematsu
Yasushi Kobayashi
Shigeo Takeuchi
Osamu Yamamoto
Ryota Suematsu
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