Digital Signatures are the signatures which are generally used authenticate the contents of any type of electronic documnet which are generally sent over the web. Normally signatures are commonly used to authenticate documents, likewise we use digital signatures for electronic documnet.
Digital signatures are equivalent to handwritten signatures and stamped seals. But a digital signature is more difficult to forge than a handwritten signature.mentioned below are some of the applications of digital signatures.
A DS is generally used to authenticate the the source of messages. With the help of some secret key which can only be used by the owner, a valid signature can show that the message has been sent by that person only and in no manner he can refuse this.
Sometimes during the transmission there might be a slightest possibility that the message can be altered, so basically a Digital Signature provides a coonfidence that in no manner the content of the message has been altered.each time a message has been modified, it is to be considered to be a new message so it will be reproduced with a valid Digital Signature.
repudiation generally means dissaproval of something.So with a digital Signature one cannot deny the fact that the message or document that are once digitally signed cannot in later time deny the fact of having signed it.
There are a few advantages of digital signatures over a normal signature such as :
- It can be worked from almost anywhere in the world and one need not to be remain present at that time.
- a few clicks or taps can help to approve the paperwork
- the best advntage of a digital Signature is that important documents which are digitally signed can be accessed from any device.
The only disdvantage in my concern would be the possibility of knowing the private key of the user. If the private key is known by someone else than there might be a possibility of forgery.