Question

12. (1 point) Let's say we use the following as the MAC function: $MAC_k(m) = h(k||m)$ Devise an attack against it (assuming we are using SHA2 as the hash function).

Name: 12 1 point lets say we use the following as the mac function mackm hkm devise an attack against it assuming we are using sha2 as the hash function 83063
Uploaded: 2024-05-23T02:22:01-08:00
Duration: 3 min 21 s
Channel: Adi S
Description: 12 1 point lets say we use the following as the mac function mackm hkm devise an attack against it assuming we are using sha2 as the hash function 83063

          12. (1 point) Let's say we use the following as the MAC function:
$MAC_k(m) = h(k||m)$
Devise an attack against it (assuming we are using SHA2 as the hash function).

12 1 point lets say we use the following as the mac function mackm hkm devise an attack against it assuming we are using sha2 as the hash function 83063

Added by Oluwaseun V.

Computer Science and Information Technology

Trishna Knowledge Systems 2018 Edition

Instant Answer

Solved by Expert Adi S

05/23/2024

Step 1

This is vulnerable to a length extension attack because SHA2 is a Merkle-Damgård construction. Show more…

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12. (1 point) Let's say we use the following as the MAC function: $MAC_k(m) = h(k||m)$ Devise an attack against it (assuming we are using SHA2 as the hash function).