Exam Details
| Subject | Cryptography | |
| Paper | ||
| Exam / Course | Master's in Mathematics with Applications in Computer Science | |
| Department | School of Sciences (SOS) | |
| Organization | indira gandhi national open university | |
| Position | ||
| Exam Date | December, 2015 | |
| City, State | new delhi, |
Question Paper
1. Write a program in language that decrypts text which is encrypted using the vigenere cipher. Verify the program by decrypting the following text which was encrypted using Vigenere cipher with 'CONFIDENTIAL' as the key word:
VVRSQ MGKQE ZSAWM OVCRC RPFVB IPMAX BTRRT UYDGZ BPAOV SNNHP CYNDH GFGPF
VVRSQ ZSAWM RPFVB BTRRT BPAOV CYNDH
MGKQE OVCRC IPMAX UYDGZ SNNHP GFGPF
Write a program in GP that returns a random prime of length 256 bits.
Find all the irreducible polynomials of degree 4 over F3, the finite field with three elements, using a program in GP.
Write a program in GP that prints all possible decryptions of a given string that was encrypted, using the affine cipher. Verify the program by decrypting the text "OMBLYKGBSCOPIPJOTQBH", which was encrypted using the affine cipher. Also, find the decryption key.
VVRSQ MGKQE ZSAWM OVCRC RPFVB IPMAX BTRRT UYDGZ BPAOV SNNHP CYNDH GFGPF
VVRSQ ZSAWM RPFVB BTRRT BPAOV CYNDH
MGKQE OVCRC IPMAX UYDGZ SNNHP GFGPF
Write a program in GP that returns a random prime of length 256 bits.
Find all the irreducible polynomials of degree 4 over F3, the finite field with three elements, using a program in GP.
Write a program in GP that prints all possible decryptions of a given string that was encrypted, using the affine cipher. Verify the program by decrypting the text "OMBLYKGBSCOPIPJOTQBH", which was encrypted using the affine cipher. Also, find the decryption key.
Other Question Papers
Departments
- Centre for Corporate Education, Training & Consultancy (CCETC)
- Centre for Corporate Education, Training & Consultancy (CCETC)
- National Centre for Disability Studies (NCDS)
- School of Agriculture (SOA)
- School of Computer and Information Sciences (SOCIS)
- School of Continuing Education (SOCE)
- School of Education (SOE)
- School of Engineering & Technology (SOET)
- School of Extension and Development Studies (SOEDS)
- School of Foreign Languages (SOFL)
- School of Gender Development Studies(SOGDS)
- School of Health Science (SOHS)
- School of Humanities (SOH)
- School of Interdisciplinary and Trans-Disciplinary Studies (SOITDS)
- School of Journalism and New Media Studies (SOJNMS)
- School of Law (SOL)
- School of Management Studies (SOMS)
- School of Performing Arts and Visual Arts (SOPVA)
- School of Performing Arts and Visual Arts(SOPVA)
- School of Sciences (SOS)
- School of Social Sciences (SOSS)
- School of Social Work (SOSW)
- School of Tourism & Hospitality Service Sectoral SOMS (SOTHSM)
- School of Tourism &Hospitality Service Sectoral SOMS (SOTHSSM)
- School of Translation Studies and Training (SOTST)
- School of Vocational Education and Training (SOVET)
- Staff Training & Research in Distance Education (STRIDE)
Subjects
- Algebra
- Coding Theory
- Complex Analysis
- Computer Graphics
- Cryptography
- Design and Analysis of Algorithms
- Differential Equations And Numerical Solutions
- Functional Analysis
- Graph Theory
- Linear Algebra
- Mathematical Modelling
- Pattern Recognition and Image Processing
- Probability And Statistics
- Programming and Data Structures
- Real Analysis
- Soft Computing and its Applications