BharatNotes Encryption
nounUsage in a UPSC answer
As governance migrates onto digital rails, end-to-end encryption becomes the bedrock of citizens' privacy, yet the state must reconcile this protection with the legitimate demands of national security, lest the same shield that guards the individual also cloak the conspirator.
Synonyms
Antonyms
Word Family
encrypt (v), encrypted (adj), encrypting (v pres.p), decrypt (v), decryption (n), cryptographic (adj)
Root
Coined 1950s; en- = in; Greek kruptos = hidden; -ion = noun suffix
Etymology
From the verb encrypt, coined in the 1950s in the United States from en- ("in") + Greek kruptos ("hidden"); the noun form encryption first appeared in the 1960s.
Memory Hook
En- (put into) + crypt (a hidden underground vault) = to lock your message inside a 'crypt' where only the key-holder can enter; think 'crypto' = hidden.
How This Word Works in UPSC Writing
The conversion of readable data into a form only an authorised holder of the key can recover. Two distinctions carry most of the analysis. Symmetric encryption uses one shared key and is fast, but the key must somehow be exchanged securely, which is the problem asymmetric encryption solves by using a public key to encrypt and a mathematically related private key to decrypt, so a message can be sent to someone never met before. And encryption in transit protects data as it crosses a network while the service provider can still read it at the endpoints, whereas end-to-end encryption keeps the keys with the communicating users so the provider itself cannot. That second distinction is the whole of the policy dispute, because a provider who cannot read messages cannot hand them over. The technical objection to a lawful-access backdoor is not that access is illegitimate but that a deliberate weakness cannot be reserved for authorised users alone, since anyone who discovers it can exploit it.
Don’t Confuse It With
Symmetric encryption uses a single shared key and is fast, while asymmetric or public-key encryption uses a public key to encrypt and a private key to decrypt, solving the problem of exchanging keys with a stranger. Encryption in transit protects data crossing a network but leaves the provider able to read it at the endpoints, whereas end-to-end encryption leaves the keys only with the communicating parties. Hashing is one-way and cannot be reversed, so it verifies rather than conceals. A backdoor is a deliberate weakness for authorised access, and the objection to it is that it cannot be restricted to the intended user.
Hindi Meaning
कूटलेखन (kūtlekhan) or एन्क्रिप्शन.
Common Questions
- What is the difference between symmetric and asymmetric encryption?
- Symmetric uses one shared key for both operations and is fast but requires secure key exchange, while asymmetric uses a public key to encrypt and a private key to decrypt, allowing strangers to communicate securely.
- Why do technologists object to encryption backdoors?
- Because a deliberate weakness cannot be limited to authorised users; anyone who discovers it can exploit it, so the vulnerability created is available to attackers as well.
Seen in UPSC Question Papers
- Prelims 2015 — Information Technology
Real UPSC previous-year questions whose text uses “Encryption” — proof this word earns its place on your list.
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