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Function lacking property would fail as cryptographic hash

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Reference no: EM133309501

Questions

1. Briefly explain 5 properties a cryptographic hash function must satisfy. Pick any property and describe a scenario when a function lacking this property would fail as a cryptographic hash.

2. Explain the following statement: "Strong collision resistance implies weak collision resistance."

3. Briefly explain why CRC should not be used in place of a cryptocraphic hash.

4. Describe main advantages of SHA-3 over SHA-2.

5. Why isn't it enough to provide integrity by sending a message (M) and its hash (H(M)) from Alice to Bob?

6. What is the primary difference between MAC and HMAC?

7. Briefly explain the use of hashing in online bidding.

8. Briefly explain the idea of steganography and give an example of its practical use.

9. How many collisions would you expect to find if your hash function generates 12-bit output and you hash 1024 random messages.

10. Consider a CRC with divisor 10011. Find a collision with a message 10101011, that is a (different) message that produces the same CRC.

Reference no: EM133309501

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