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Which of the following types of cryptography should be …

Which of the following types of cryptography should be used when minimal overhead is necessary for a mobile
device?

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A.
Block cipher

B.
Elliptical curve cryptography

C.
Diffie-Hellman algorithm

D.
Stream cipher

Explanation:
Regarding the performance of ECC applications on various mobile devices, ECC is the most suitable PKC
(Public-key cryptography) scheme for use in a constrained environment.
Note: Elliptic curve cryptography (ECC) is an approach to public-key cryptography based on the algebraic
structure of elliptic curves over finite fields. One of the main benefits in comparison with non-ECC cryptography
(with plain Galois fields as a basis) is the same level of security provided by keys of smaller size. Using smaller
key size would be faster.

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