Two users must encrypt and transmit large amounts of data between them.
Which of the following should they use to encrypt and transmit the data?
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A. B. C. D.A.
To encrypt and transmit large amounts of data between two users, the best option is to use a symmetric algorithm.
Symmetric key algorithms use the same secret key to both encrypt and decrypt the data. This makes them very fast and efficient for encrypting large amounts of data. Both users would need to agree on the same secret key beforehand, and then use it to encrypt and decrypt the data.
Hash functions are used to verify the integrity of data, but they do not provide encryption. A hash function takes an input (such as a file) and produces a fixed-size output (hash) that is unique to that input. The hash can be used to verify that the data has not been tampered with. However, it cannot be used to encrypt the data.
Digital signatures are used to verify the authenticity and integrity of data, but they also do not provide encryption. Digital signatures use public key cryptography to sign the data, which can then be verified using the signer's public key. This provides a way to verify that the data was not tampered with and that it came from the expected sender. However, it does not encrypt the data itself.
Obfuscation is a technique used to make code or data difficult to understand or reverse-engineer. It does not provide any form of encryption or secure transmission.
Therefore, the best option for the two users to encrypt and transmit large amounts of data between them is to use a symmetric algorithm.