Sign in digitally
Jaspreet Bedi
Authentication
has a prominent place to resolve the disputes since times
immemorial. For a common man, authentication of document means
signatures and attestation. During current times, when the e-fever
is on and the use of e-laws, e-mails, e-governance , e-business ,
e-learning is at its peak, electronic documents in the form of
letters, forms, cards, messages, appointments and promises are
popular. Electronic signatures are used at the end of e-mail and are
very popular. On the contrary, digital signatures are done
electronically by using the technique of asymmetric cryptography,
that is through a combination of private and public key.
Execution:
The private key is with the subscriber who has to create signatures
digitally, while public key is with the receiver who has to verify
the digital signatures. In order to execute digital signatures,
digital signature software is used. For this, a hash function is
used by the signer and a hash result, also called message digest, is
created. Then the signer uses the private key. (It is called
encryption). Now this is ready to be sent. The receiver on the other
end uses the same hash function and the public key to get back the
original message. (The process is called decryption).
Advantages:
1. Digital signatures
provide confidentiality of the information.
2. Digital signatures
can be effectively used in the field of e-commerce.
3. Forgery is
impossible until the signer has no control over his private key.
4. Digital signatures
can be used for various legal purposes.
Exceptions:
Although digital signatures are approved by the IT Act 2000 and
applies to all electronic
documents yet, negotiable documents, power of attorney, wills &
some documents for the sale of immovable
property etc. are exempted.
Certification:
Digital signature certificate is issued by the certifying authority
appointed under the IT Act. A certain amount of fee needs to be
submitted. The certifying authority is authorised to suspend or
revoke a digital signature certificate after publishing notice of
the same.
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