Digital Signature

1300 WordsOct 26, 20126 Pages
DIGITAL SIGNATURE A digital signature is an electronic signature that can be used to authenticate the identity of the sender of a message or the signer of a document, and possibly to ensure that the original content of the message or document that has been sent is unchanged. Why use certificate signatures? Many business transactions, including financial, legal, and other regulated transactions, require high assurance when signing documents. When documents are distributed electronically, it is important that recipients can: * Verify document authenticity – confirming the identity of each person who signed the document * Verify document integrity – confirming that the document has not been altered in transit…show more content…
4. Name of the company: This section identifies the company that the signature belongs too. 5. Serial number of the Digital ID: This part is a unique number that is bundled to the signature for tracking ad extra identification reasons. 6. Digital signature of the CA (certification Authority): This is a signature that is issued by the authority that issues the certificates. Figure A User A is depicted above and has two keys a public key, this key is available to the public for download, and a private key, this key is not available to the public. All keys are used to lock the information in an encrypted mode. The same keys are required to decrypt the data. Another user can encrypt the data using users A’s Public Key. User A will use the Private Key to decrypt the message. Without user A’s Private Key the data can not be decrypted. Figure B below depicts the encryption method and decryption method and witch keys are used. Figure B Digital signature can be used to make document e-mails and other data private. Big brother is out there and choosing a high encryption mechanism ensures that any one attempting to decrypt the data would find it unviable to attempt decryption. User A’s machine digests the data into a simple string of code after user A’s software has encrypted the message digest with his private key. The result is the digital signature. User A’s software
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