**1 **What is the zero point of an elliptic curve?

**2 **What is the sum of three points on an elliptic curve that lie on a straight line?

**3 **What characteristics are needed in a secure hash function?

**4 **What is the difference between weak and strong collision resistance?

**5 **What is the role of a compression function in a hash function?

** **

**1 **What is the difference between little-endian and big-endian format?

**2 **What basic arithmetical and logical functions are used in SHA?

**3 **Describe the set of criteria used by NIST to evaluate SHA-3 candidates.

**4 **Define the term *sponge construction*.

**5 **Briefly describe the internal structure of the iteration function *f*.

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