As we know with the rise of Digital revolution due to increase in cyber frauds we see
that Digital signatures have came up with massive usages duirng online shopping,
or online trading. here in this article we will get to know what do you mean by
digital signatures and how it works.
What is the meaning of Digital Signatures ?
As the name system Digital signature is the type of signature that is done
electrically using some mathematical pin or algorithm instead of using pen
or paper to ensure the authenticity of the message when it is being received
from sender to receiver. A Digital Signature is used to make sure that the
contents of the message have not been altered in the Transit.
It uses a standard accepted format called Public Key Infrastructure to provide
highest level of security.
How Does Digital Signatures Work ?
according to which when a sender sends message to the receiver there are basically
two keys generated one is public key and another is private key.
The Private key is with the sender which must be maintained properly by the sender
and The Public key is with receiver which he uses for decrypting the message.
Let us understand it with a example:
Step1: A wants to send a message to B
Step2:A must have the private key to sign the message digitally
Step3: An algorithm known as hash value encrypts the message into hash value
Step4: A's Private key encrypts the message using his private key and the
document is then said to be digitally signed and sent to B
Step5: When B receives the Digitally signed document , B decrypts it using
Alice public key which he received with the document.
Step6: After calculating the hash value is compared with the public key
Step7: if the decryption hash value generated is equal to the hash value
when he received the file , that means the file is not tampered
else if hash value do not match , that means the file is tampered
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