CEC 304 Data Security and Integrity CA 2024
About this paper
CEC 304: Mid-Semester Examination, May 2024 (printed course code CFC304 on the source document, treated as this course per its folder and recurring instructor/content), University of Buea: a 4-bit substitution-cipher CBC exercise; ECDH encryption/decryption of a word via a pairing table on the shared elliptic curve (this question's own numeric parameters are missing from the source and are supplied, flagged); RSA encryption/decryption; a Vigenere cipher (keyword FIRST); and a conceptual question on ECB vs CBC error propagation.
Opens this paper in the app on your phone.
University of Buea
College of Technology - COT
Computer Engineering - CET
Data Security and Integrity
CA · Second Semester · Level 300
From this paper
- 4.
The ciphertext BMJLXWVNGKQL is the result of encrypting a message in the Vigenere system, using the keyword FIRST. Find the message. [3 marks]
- 5.
Suppose DES is used to encrypt a sequence of plaintexts P1, P2, P3, . . . , Pi, . . . , PN into the corresponding ciphertext blocks C1, C2, C3, . . . , Ci, . . . , CN . If block Ci is corrupted during transmission, which block(s) will not be decrypted successfully using the i) Electronic Code Block (ECB) mode? ii) Cipher Block Chaining (CBC) mode? [3 marks]
At a glance
- Course code
- CEC304 (CEC 304)
- Type
- CA
- Year
- 2024
- Level
- Level 300
- Semester
- Second Semester
- Proposed solution
- Included
Where it's from
University
University of BueaFaculty
College of Technology - COTDepartment
Computer Engineering - CETElectrical / Renewable - EET/REN
Read CEC304 2024 in Shoracy.
- Every page, with zoom for diagrams and small print
- The proposed solution, one tap away
- Stays on your phone after the first open, even offline
Don't have the app yet?