- what is a digital signature? how is it used? what are the duties of certifying authorities in regard to its usage?
Answers
Answered by
1
The Digital Signature
Understanding a direct digital signature begins by recognizing there are only two parties involved in the passing of the signed information: the sender and the receiver. Direct digital signatures only require these two entities because the receiver of the data (digital signature) knows the public key used by the sender. And the sender of the signature trusts the receiver not to alter the document in any way.
You can create a digital version of your signature.
Step 1
Write your signature using a black pen on a neutral background. The best background would be a piece of clear plastic like a transparency sheet. If clear plastic is unavailable, choose a piece of plain, unlined white paper. Any background color behind the signature will be seen and may interfere with the appearance of the PDF document.
Step 2
Scan the image at 300 DPI using the black-and-white text setting. Save the image as a bitmap using a GIF, JPEG or TIFF extension.
Step 3
Convert the image to a vector file using a photo-editing program such as Adobe Photoshop or Illustrator. Open the image file in the program, click "File," choose "Save As" and save it as a vector file. Once the image has been converted to a vector file, it can be reopened and edited.
Step 4
Trace over the signature using the drawing tool in the software you used for the conversion to darken lines and repair any flaws in the signature's appearance.
Step 5
Save the signature as a PDF file when you have finished editing the signature. Click "File," choose "Save As" and pick "PDF." Click "OK" to close the signature file.
Understanding a direct digital signature begins by recognizing there are only two parties involved in the passing of the signed information: the sender and the receiver. Direct digital signatures only require these two entities because the receiver of the data (digital signature) knows the public key used by the sender. And the sender of the signature trusts the receiver not to alter the document in any way.
You can create a digital version of your signature.
Step 1
Write your signature using a black pen on a neutral background. The best background would be a piece of clear plastic like a transparency sheet. If clear plastic is unavailable, choose a piece of plain, unlined white paper. Any background color behind the signature will be seen and may interfere with the appearance of the PDF document.
Step 2
Scan the image at 300 DPI using the black-and-white text setting. Save the image as a bitmap using a GIF, JPEG or TIFF extension.
Step 3
Convert the image to a vector file using a photo-editing program such as Adobe Photoshop or Illustrator. Open the image file in the program, click "File," choose "Save As" and save it as a vector file. Once the image has been converted to a vector file, it can be reopened and edited.
Step 4
Trace over the signature using the drawing tool in the software you used for the conversion to darken lines and repair any flaws in the signature's appearance.
Step 5
Save the signature as a PDF file when you have finished editing the signature. Click "File," choose "Save As" and pick "PDF." Click "OK" to close the signature file.
Similar questions