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index-of-coincidence

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In this project, we experiment with the use of diverse cryptographic algorithms. First, we attempt to encrypt a plaintext message using the Vigenère Algorithm and a fixed-length encryption key. Afterward, we experiment with the decryption of the produced cipher using Kasiski's Method, as well as the Index of Coincidence statistical test.

  • Updated Dec 2, 2024
  • Jupyter Notebook

Vigenère cipher, keyed Vigenère cipher and autokey cipher. Single and double columnar transposition ciphers. Cryptanalysis of the Vigenère cipher. Data Structures and Algorithms Lab, summer 2018 (offered by Bachelor's Programme in Computer Science, University of Helsinki).

  • Updated Jun 2, 2021
  • Java

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