Encryption

noun

/ɪnˈkrɪp.ʃən/

The process of converting readable data (plaintext) into an unreadable format (ciphertext) using a key or algorithm, so that only authorised parties with the correct decryption key can access the original information.

✍️ Usage 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

encipheringencodingcryptographic codingcipheringscramblingencipherment

Antonyms

decryptiondeciphermentdecodingunscrambling

🌱 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.

📝 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.

🔬 Science & Technology 📖 Seen in: IT, Cybersecurity & Defence Technology...

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