Exam 13: Digital Signatures

The ____________ components of DSA are the same as in the Schnorr signature scheme.

A _________ is an authentication mechanism that enables the creator of a message to attach a code that acts as a signature.

The term __________ refers to a digital signature scheme that involves only the communicating parties.

Message authentication protects two parties who exchange messages from any third party,however,it does not protect the two parties against each other.

The __________ is formed by taking the hash of the message and encrypting the message with the creator's private key.

It is important in a direct digital signature to perform an outer confidentiality function first and then the signature function.

The __________ scheme minimizes the message dependent amount of computation required to generate a signature.

It must be relatively difficult to recognize and verify the digital signature.

In the __________ approach only the sender knows the private key so only the sender could have produced a valid signature.

A digital signature must have the following properties: it must verify the author and the date and time of the signature;it must authenticate the contents at the time of the signature;and it must ___________ to resolve disputes.

__________ is where the attacker forges a signature for a particular message chosen by the attacker.

The main work for signature generation depends on the message and is done during the idle time of the processor.

The first stage in generating an RSA-PSS signature of a message M is to generate from M a fixed-length message digest,called an ______________.

The _________________,which is the latest of the RSA schemes,is the one that RSA Laboratories recommends as the most secure of the RSA schemes.

The digital signature function does not include the authentication function.

The DSS approach makes use of a hash function.

The most important development from the work on public-key cryptography is the digital signature.

A digital signature can guarantee the integrity but not the source of the message.

As with ElGamal encryption,the global elements of __________ are a prime number q and a,which is a primitive root of q.

The first part of the Schnorr digital signature scheme is the generation of a private/public key pair.