Information Security
Mamoona Jabbar
,Information Security
Topic: Digital Signature
, Digital Signature
• Digital signatures are the public-key primitives of message authentication.
• In the physical world, it is common to use handwritten signatures on handwritten or
typed messages. They are used to bind/ attached signatory to the message.
• A digital signature is a technique that binds a person/entity to the digital data. This
binding can be independently verified by receiver as well as any third party.
• Digital signature is a cryptographic value that is calculated from the data and a secret
key known only by the signer.
• In real world, the receiver of message needs assurance that the message belongs to the
sender and he should not be able to repudiate the origination of that message. This
requirement is very crucial in business applications, since likelihood of a dispute over
exchanged data is very high.
Mamoona Jabbar
,Information Security
Topic: Digital Signature
, Digital Signature
• Digital signatures are the public-key primitives of message authentication.
• In the physical world, it is common to use handwritten signatures on handwritten or
typed messages. They are used to bind/ attached signatory to the message.
• A digital signature is a technique that binds a person/entity to the digital data. This
binding can be independently verified by receiver as well as any third party.
• Digital signature is a cryptographic value that is calculated from the data and a secret
key known only by the signer.
• In real world, the receiver of message needs assurance that the message belongs to the
sender and he should not be able to repudiate the origination of that message. This
requirement is very crucial in business applications, since likelihood of a dispute over
exchanged data is very high.
