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Digital Signature

What is Digital Signature (DSC)?

  • A Digital Signature (DSC) is a cryptographic technique that is used to verify the authenticity and integrity of digital documents or messages. It is the digital equivalent of a handwritten signature or a stamped seal on a physical document.
  • A DSC is created using public-key cryptography, which involves a pair of cryptographic keys: a private key and a public key. The private key is kept securely by the signer and is used to digitally sign documents, while the public key is made available to others for verification purposes. When a digital document is signed using a DSC, a unique digital fingerprint, called a hash, is generated from the contents of the document using a mathematical algorithm. The private key is then used to encrypt the hash, creating a digital signature. This signature is attached to the document, along with the signer’s public key.
  • To verify the integrity and authenticity of the document, the recipient can use the signer’s public key to decrypt the digital signature, obtaining the original hash. The recipient can then independently calculate the hash of the received document and compare it with the decrypted hash. If they match, it confirms that the document has not been altered since it was signed and that the signature is valid.

    Digital signatures provide several benefits :

    The requirement for a Shop Act License varies from state to state within a country. In general, any establishment or business operating within a particular jurisdiction that falls under the purview of the Shops and Establishments Act is obligated to obtain a Shop Act License. The following types of businesses typically require a Shop Act License :

    • Authentication : They verify the identity of the signer, ensuring that the document comes from the expected source.
    • Integrity : They ensure that the document has not been tampered with or modified since it was signed.
    • Non-repudiation : They prevent the signer from denying their involvement in signing the document since the private key is unique to the signer.

    Digital signatures are widely used in various applications, such as online transactions, electronic contracts, government forms, and email communications, to ensure the security and trustworthiness of digital documents.

    Who Can Make Digital Signature (DSC)?

    Digital signatures can be created by individuals or organizations who possess a digital certificate issued by a trusted Certification Authority (CA). The process of obtaining a digital certificate typically involves the following steps :

    • Generate a Key Pair : The person or organization intending to obtain a digital signature must generate a pair of cryptographic keys—a private key and a corresponding public key. The private key should be kept secure and not shared with anyone.
    • Apply For a Digital Certificate : The individual or organization needs to apply to a trusted Certification Authority (CA) to obtain a digital certificate. The CA is responsible for verifying the identity of the applicant and issuing the digital certificate.
    • Identity verification : The CA performs a verification process to confirm the identity of the applicant. This can involve various methods, such as checking government-issued identification documents, conducting in-person verification, or using other trusted means of authentication.
    • Certificate Issuance : Once the CA has verified the identity of the applicant, they issue a digital certificate. The digital certificate contains the public key of the applicant and is digitally signed by the CA, ensuring its authenticity.
    • Usage Of The Digital Certificate : With the digital certificate in hand, the individual or organization can now use it to create digital signatures. They can sign digital documents, emails, or other electronic communications using their private key, and recipients can verify the signatures using the corresponding public key contained in the digital certificate.

    It’s worth noting that the process of obtaining a digital certificate may vary depending on the CA and the specific requirements in different jurisdictions. Additionally, some countries may have specific regulations or guidelines regarding the usage of digital signatures.

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