Which of the following algorithms is found to be suitable for both digital signature and encryption?

The correct answer is D. RSA. RSA is an asymmetric (public-key) algorithm that supports both digital signatures (sign with private key, verify with public key) and encryption (encrypt with public key, decrypt with private key), making it uniquely suited for both operations in the same framework. SHA-1 and…

Infrastructure Security

Question

Options

ASHA-1
BMD5
CAES
DRSA

How the community answered

(45 responses)

A
2% (1)
B
9% (4)
C
16% (7)
D
73% (33)

Explanation

RSA is an asymmetric (public-key) algorithm that supports both digital signatures (sign with private key, verify with public key) and encryption (encrypt with public key, decrypt with private key), making it uniquely suited for both operations in the same framework.

SHA-1 and MD5 are hash functions - one-way operations that produce a fixed-length digest; they cannot encrypt or decrypt data, so A and B are wrong. AES is a symmetric encryption algorithm - excellent at encryption, but it has no mechanism for digital signatures since both parties share the same key.

Memory tip: Think "RSA does it all" - it's the Swiss Army knife of public-key cryptography, used in TLS, email signing (PGP/S-MIME), and certificate authorities precisely because one algorithm handles both confidentiality and authenticity. If a choice is hash-only or symmetric-only, it can't do both jobs.

Topics

#RSA#Digital Signatures#Asymmetric Cryptography#Public Key Infrastructure

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