GSLC · Question #241
SSH is a network protocol that allows data to be exchanged between two networks using a secure channel. Which of the following encryption algorithms can be used by the SSH protocol? Each correct…
The correct answer is A. DES B. Blowfish C. IDEA. SSH supports multiple symmetric encryption algorithms for securing data in transit; this question tests knowledge of which ciphers are valid SSH bulk encryption options.
Question
SSH is a network protocol that allows data to be exchanged between two networks using a secure channel. Which of the following encryption algorithms can be used by the SSH protocol? Each correct answer represents a complete solution. Choose all that apply.
Options
- ADES
- BBlowfish
- CIDEA
- DRC4
How the community answered
(41 responses)- A88% (36)
- D12% (5)
Why each option
SSH supports multiple symmetric encryption algorithms for securing data in transit; this question tests knowledge of which ciphers are valid SSH bulk encryption options.
DES is a symmetric block cipher that SSH protocol implementations have historically supported as a bulk encryption algorithm, though it is considered weak due to its 56-bit key length.
Blowfish is a fast, symmetric block cipher explicitly supported by SSH as a valid bulk encryption algorithm and is commonly available in SSH implementations.
IDEA (International Data Encryption Algorithm) is a 128-bit symmetric cipher that is recognized as a supported encryption algorithm within SSH protocol specifications.
RC4 is a stream cipher most commonly associated with SSL/TLS and WEP rather than being classified as a standard SSH bulk encryption cipher in this exam context.
Concept tested: SSH supported symmetric encryption algorithms
Source: https://datatracker.ietf.org/doc/html/rfc4253
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