Question
Company A and company B need to communicate in a secure way. For each of the following scenarios, you need to identify and justify which
Company A and company B need to communicate in a secure way.
For each of the following scenarios, you need to identify and justify which of the following four states has been achieved:
Confidentiality. 2- Integrity. 3- Authenticity. 4- Non-repudiation.
Scenario A:
Company A sends an encrypted message to Company B using a shared key. (Assumption: Both companies maintain the secrecy of the shared key.)
Scenario B:
Company A encrypts a hashed message using its own private key.
Scenario C:
Company A hashes a message and sends the hash and the message through two channels. Company B receives the message and hashes it using the same hash function. After comparing the received hash to the generated hash, they find an exact match.
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