18-07-2012, 01:29 PM
DIGITAL SIGNATURE
[attachment=27944]
Definitions
Digital Signature - a data string which associates a message with some originating entity
Digital Signature Generation Algorithm – a method for producing a digital signature
Digital Signature Scheme - consists of a signature generation algorithm and an associated verification algorithm
Digital signature
Digital signature is a data items that vouches the origin and integrity of message.
The originator of a message uses a signing key (Private Key) to sign the message and send the message and its digital signature to a recipient
The recipient uses a verification key (Public Key) to verify the origin of the message and that it has not been tampered with while in transit
Public Key Cryptography
Public key encryption :
a message encrypted with a recipient's public key cannot be decrypted by anyone except a possessor of the matching private key—presumably, this will be the owner of that key and the person associated with the public key used. This is used for confidential .
Public key decryption:
Public key decryption means conversion of the data from coded language means machine readable data to user readable data is called the public key decryption key.
Authentication and Verification
Any changes made to the report will invalidate the signature
Provides evidence of report integrity
Provides proof of report originator’s identity - Authentication
Advantages
Using a digital signature satisfies some type of legal requirement for the document in question. A digital signature takes care of any formal legal aspect of executing the document.
Disadvantages
The disadvantages of using digital signatures involve the primary avenue for any business: money. This is because the business may have to spend more money than usual to work with digital signatures including buying certificates from certification authorities and getting the verification software
[attachment=27944]
Definitions
Digital Signature - a data string which associates a message with some originating entity
Digital Signature Generation Algorithm – a method for producing a digital signature
Digital Signature Scheme - consists of a signature generation algorithm and an associated verification algorithm
Digital signature
Digital signature is a data items that vouches the origin and integrity of message.
The originator of a message uses a signing key (Private Key) to sign the message and send the message and its digital signature to a recipient
The recipient uses a verification key (Public Key) to verify the origin of the message and that it has not been tampered with while in transit
Public Key Cryptography
Public key encryption :
a message encrypted with a recipient's public key cannot be decrypted by anyone except a possessor of the matching private key—presumably, this will be the owner of that key and the person associated with the public key used. This is used for confidential .
Public key decryption:
Public key decryption means conversion of the data from coded language means machine readable data to user readable data is called the public key decryption key.
Authentication and Verification
Any changes made to the report will invalidate the signature
Provides evidence of report integrity
Provides proof of report originator’s identity - Authentication
Advantages
Using a digital signature satisfies some type of legal requirement for the document in question. A digital signature takes care of any formal legal aspect of executing the document.
Disadvantages
The disadvantages of using digital signatures involve the primary avenue for any business: money. This is because the business may have to spend more money than usual to work with digital signatures including buying certificates from certification authorities and getting the verification software