Electrical computers and digital processing systems: support – Multiple computer communication using cryptography – Protection at a particular protocol layer
Reexamination Certificate
2005-05-24
2005-05-24
Vu, Kim (Department: 2135)
Electrical computers and digital processing systems: support
Multiple computer communication using cryptography
Protection at a particular protocol layer
C707S793000
Reexamination Certificate
active
06898714
ABSTRACT:
A method and system for processing PKCS-attributes and user-defined attributes in heterogeneous environment is provided. Attributes are registered with a PKCS9 gateway class, and the attributes include user-defined attributes and PKCS-standard defined attributes. Each of the registered attributes is associatively stored with an identifier. A method in the PKCS9 gateway class may be called with a parameter containing an object identifier for an attribute. An attribute mapping data structure is searched using the object identifier in the received parameter, and in response to finding a matching object identifier, a class identifier that has been associatively stored with the matching object identifier is retrieved from the attribute mapping data structure. A method in the class identified by the class identifier is then called. The called method may include an operation for construction, attribute conversion to and from DER-encoding, attribute differentiation, and attribute value extraction. A class hierarchy of attribute types is based on an abstract class for all attribute objects with a subclass for undefined attributes and a subclass for defined attributes. The subclass for defined attributes is further decomposed into a subclass for each PKCS-defined attribute and a subclass for each user-defined attribute.
REFERENCES:
patent: 5261098 (1993-11-01), Katin et al.
RSA Laboratories. PKCS #9 v2.0: Selected Object Classes and Attribute Types—Draft #3. Oct. 22, 1999. RSA Laboratories. v2.0.*
PKCS #9 v2.0: Selected Object Classes and Attribute Types—Draft #3; Oct. 22, 1999; pp. 1-36.
An Overview of the PKCS Standards; Kaliski, Burton S.; Nov. 1, 1993; pp. 1-27.
A Layman's Guide to a Subset of ASAN.1, BER and DER; Kalisk, Burton S.; Nov. 1, 1993; pp. 1-38.
PKCS #9: Selected Attribute Types; Nov. 1, 1993; pp. 1-10.
London Shrader Theodore Jack
Nadalin Anthony Joseph
Rich Bruce Arland
Yarsa Julianne
Akpati Tracey
Emile Volel
International Business Machines - Corporation
Vu Kim
Walder, Jr. Stephen J.
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