Method of protecting a control vector in an optional block of a standard key block
AssigneeInternational Business Machines Corporation
InventorsTodd W. Arnold, Carsten D. Frehr, Richard V. Kisley
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Abstract
A computer program product is provided and includes a tangible storage medium readable by a processing circuit and on which instructions are stored for execution by the processing circuit for performing a method. The method includes validating parameters passed to a parameter database, computing a length required for control vector CV data, preparing an optional block in accordance with a result of the computation, converting the CV to a format for a standardized key block while copying the converted CV into the optional block and updating optional block data in the standardized key block.
Claims5
A method comprising:
- validating parameters passed to a parameter database;
- computing a length, a format and a processing method required for encoding control vector (CV) data in an optional block;
- preparing the optional block of a standardized key block in accordance with a result of the computation;
- converting the CV to the computed format by way of the computed processing method for the standardized key block while copying the converted CV into the optional block;
- and
- updating optional block data in the standardized key block,
- wherein the computing comprises computing a required length for the CV data and computing required lengths of sub blocks and the preparing of the optional block comprises preparing an optional block tag and length fields of the standardized key block and preparing an identifier of proprietary information, a sub block identifier and length fields.
Dependencies are inferred from the claim text.