CAN/CSA-ISO/IEC-9796-94 (R1999)
This National Standard of Canada is equivalent to International Standard
ISO/IEC 9796:1991.
1 Scope
This International Standard specifies a digital signature scheme giving message
recovery for messages of limited length and using a public-key system.
This digital signature scheme includes
- a signature process using a secret signature key and a signature
function for signing messages;
- a verification process using a public verification key and a
verification function for checking signatures while recovering
messages.
During the signature process, messages to be signed are padded and extended if
necessary. Artificial redundancy is then added, depending upon the message
itself. No assumption is made as to the possible presence of natural
redundancy in the messages. The artificial redundancy is revealed by the
verification process. The removal of this artificial redundancy gives message
recovery.
This International Standard does not specify the key production process, the
signature function and the verification function. Annex A gives an example of
a public-key system including key production, signature function and
verification function. The various steps of these operations are illustrated
by examples in annex B.
Some parameters in the scheme are related to security: this International
Standard does not specify the values to be used in order to reach a given level
of security. However, this International Standard is specified in such a way
as to minimize the required changes in its use if some of these parameters have
to be modified.
SDO:
CSA
Language:
English
ICS Codes:
35.040
Status:
Withdrawn
Publish date:
1994-11-29
Standard Number:
CAN/CSA-ISO/IEC-9796-94 (R1999)