Question

Which of the following describes the first step in establishing an encrypted session
using a Data Encryption Standard (DES) key?
A. Key clustering
B. Key compression
C. Key signing
D. Key exchange

Answer 1

Answer:

Key exchange

Explanation:

Key exchange (also key establishment) is a method in cryptography by which cryptographic keys are exchanged between two parties, allowing use of a cryptographic algorithm. If the sender and receiver wish to exchange encrypted messages, each must be equipped to encrypt messages to be sent and decrypt messages received.

Answer 2

Key exchange describes the first step in establishing an encrypted session using a Data Encryption Standard key (Option D).

• The Data Encryption Standard (DES) is a symmetric block cipher algorithm used to encrypt digital data.

• This algorithm (Data Encryption Standard) can be used to encrypt the digital data in blocks of 64 bits.

• Moreover, key exchange is a procedure by which cryptographic keys are interchanged between the two parties.

In conclusion, key exchange describes the first step in establishing an encrypted session using a Data Encryption Standard key (Option D).

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