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i've been google'ing the difference between digital signature and digital certificate (asymmetric encryption) seems like they are the same. I would like to clarify if they are the same or not? many thanks!!!
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Digital signature is like a fingerprint or an attachment to a digital document that ensures its authenticity and integrity. Digital certificate is a file that ensures holder's identity and provides security.
The difference between digital certificates and digital signatures is that digital signatures help authenticate the origin of a message and digital certificates authenticate the cryptographic key that is embedded in the certificate.
A digital signature is a type of electronic signature that offers more security than a traditional electronic signature. When you sign a document with a digital signature, the signature links a “fingerprint” of the document to your identity.
An electronic signature is a broad term for any electronic process that indicates acceptance of an agreement or a record. A digital signature refers to a more secure electronic signature that is generated using a digital certificate and cryptographically bound to the document using public key infrastructure (PKI).
A digital signature is used to verify a message. It is basically an encrypted hash (encrypted by the private key of the sender) of the message. The recipient can check if the message was tampered with by hashing the received message and comparing this value with the decrypted signature.
To decrypt the signature, the corresponding public key is required. A digital certificate is used to bind public keys to persons or other entities. If there were no certificates, the signature could be easily be forged, as the recipient could not check if the public key belongs to the sender.
The certificate itself is signed by a trusted third party, a Certificate Authority like VeriSign.
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