In India, the term "Public Key Infrastructure" is used in the context of
- A.Digital security infrastructure
- B.Food security infrastructure
- C.Health care and education infrastructure
- D.Telecommunication and transportation infrastructure
Correct answer
Explanation
The correct answer is A, Digital security infrastructure. Public Key Infrastructure (PKI) is the system of keys and certificates that secures digital signatures and encrypted communication.
PKI uses a pair of keys for each user: a public key that anyone can see and a private key kept secret. A message encrypted with one can be opened only with the other, and a digital signature made with the private key can be checked with the public key. Trusted bodies called Certifying Authorities issue digital signature certificates that link a key to a person or organisation. In India the Information Technology Act, 2000 gives digital signatures legal validity, and the Controller of Certifying Authorities (CCA) licenses and supervises these authorities. PKI underpins e-filing of tax returns, e-tenders and secure banking.
B is wrong: food security relates to the public distribution system and storage, not keys and certificates.
C is wrong: hospitals and schools are physical social infrastructure.
D is wrong: roads, railways and telecom networks are not what PKI refers to.
Exam tip: PKI = public key + private key + certificates; India's regulator is the Controller of Certifying Authorities under the IT Act, 2000.
Practice Questions
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- B.1024 megabytes
- C.1200 megabytes
- D.10000 kilobytes
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3. Fast memory
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- A.1 and 2 only
- B.2 and 3 only
- C.1 and 3 only
- D.1, 2 and 3
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- B.Port
- C.Router
- D.Bus
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- A.Database management system
- B.Operating system
- C.Natural language processing
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Read the full explanation →Which one among the following computer languages is the oldest?
- A.Prolog
- B.C++
- C.Java
- D.Fortran
Show answer
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