Question
What is a digital identity? How can digital identity be related to authentication,
message integrity, and non-repudiation? Explain with the help of an example of
each.
31 Jul 2026
Answer :
Word Count : 615
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A digital identity is the collection of digital information that uniquely represents an individual, organization, device, or system in the digital environment. It consists of identifiers such as usernames, email addresses, mobile numbers, biometric data, digital certificates, passwords, cryptographic keys, and other credentials used to establish identity online. Digital identity enables secure access to online services, electronic communication, financial transactions, e-governance, cloud computing, and e-commerce. Unlike physical identity, digital identity is verified electronically using authentication mechanisms and cryptographic techniques. A strong digital identity enhances trust, privacy, accountability, and security in digital interactions. Digital identity is closely related to authentication because authentication is the process of verifying that a person or entity is genuinely who they claim to be. Authentication uses the credentials associated with a digital identity. Common authentication methods include passwords, one-time passwords (OTPs), biometric verification, smart cards, and multi-factor authentication (MFA). Authentication may rely on something the user knows (password), something the user possesses (security token or mobile phone), or something the user is (fingerprint or facial recognition). Successful authentication confirms that the digital identity belongs to the legitimate user before granting access to a system or resource. For example, when a customer logs into an online banking application, they enter
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