Question 3 (a) In the context of biometric user authentication, explain the terms: [5%] • enrolment • verification ident

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Question 3 A In The Context Of Biometric User Authentication Explain The Terms 5 Enrolment Verification Ident 1 (55.16 KiB) Viewed 12 times

Question 3 (a) In the context of biometric user authentication, explain the terms: [5%] • enrolment • verification identification. (b) With the ECB mode, if there is an error in a block of the transmitted ciphertext, only the [5%] corresponding plaintext block is affected. However, in the CBC mode, this error propagates. For example, an error in the transmitted C (Figure 3.1 below) obviously corrupts P and Pk+1. Suppose that there is a bit error in the source version of P. Through how many ciphertext blocks is this error propagated, and what is the effect at the receiver? Time 1 Time - 2 Time - N Py P. ... Exp Encryp (a) Eneryxion "₁ CK Decrype K→ Decrypt Decrypt P₂ (b) Decryption Cipher Block Chaining (CBC) Mode Figure 3.1 IV K→ (c) What is a Trojan horse attack? X [5%]