ISO/IEC 9796:1991 pdf free download.INFORMATION TECHNOLOGY – SECURITY TECHNIQUES – DIGITAL SIGNATURE – DIGITAL SIGNATURE SCHEME GIVING MESSAGE RECOVERY.
A digital signature in electronic exchange of information is a counterpart to a handwritten signature in classical mail.
Most digital signature schemes are based upon a particular public-key system. Any public-key system includes three basic operations:
— a process producing pairs of keys: a secret key and a public key;
— a process using a secret key
— a process using a public key.
In any public-key digital signature scheme, the secret key is signature process for signing messages, and the public key is verification process for verifying signatures. A pair of keys signature scheme thus consists of a secret signature key verification keys.
This International Standard specifies a scheme for digital signature of messages of limited length.
his digital signature scheme allows a minimal resource requirement for verification. It does not involve the use of a hash-function and it avoids the known attacks against the generic algorithm in use.
The message need not be in a natural language. It may be any arbitrary string of bits of limited length. Examples of such messages are cryptographic key materials and the result of hashing another, longer message, which is also called the imprint of a message. A characteristic example is a structured set of a few strings of bits generated by cryptographic software and hardware one of these strings coding control information produced within the hardware.
NOTE -The use of this International Standard may involve patented items.