Sökning: "ciphers"

Visar resultat 1 - 5 av 25 uppsatser innehållade ordet ciphers.

  1. 1. Models, Keys, and Cryptanalysis: Evaluating historical statistical language models in cryptanalysis of homophonic substitution ciphers

    Kandidat-uppsats, Göteborgs universitet/Institutionen för filosofi, lingvistik och vetenskapsteori

    Författare :Filip Fornmark; [2023-01-19]
    Nyckelord :statistical language models; cryptanalysis; historical cryptology; homophonic substitution;

    Sammanfattning : This thesis presents an empirical study connected to historical cryptography and especially within the framework of the research project DECRYPT. One of the research questions in the DECRYPT project relates to the use of language models for automatic cryptanalysis. LÄS MER

  3. 2. Evaluating and Fine-Tuning a Few-Shot Model for Transcription of Historical Ciphers

    Master-uppsats, Uppsala universitet/Institutionen för lingvistik och filologi

    Författare :Ingrid Eliasson; [2023]
    Nyckelord :historical ciphers; few-shot learning; automatic transcription;

    Sammanfattning : Thousands of historical ciphers, encrypted manuscripts, are stored in archives across Europe. Historical cryptology is the research field concerned with studying these manuscripts - combining the interest of humanistic fields with methods of cryptography and computational linguistics. LÄS MER

  4. 3. Polybius Square Ciphers

    Kandidat-uppsats, Linnéuniversitetet/Institutionen för matematik (MA)

    Författare :Xiangbo Kong; [2022]
    Nyckelord :Polybius Square Ciphers;

    Sammanfattning : In this thesis, we will define Polybius Square Ciphers and explain howit used to encrypt plaintext. We will talk about Playfair, ADFGX andADFGVX. We will introduce how Shannon entropy works and its principalproperties. LÄS MER

  5. 4. The Influence of Language Models on Decryption of German Historical Ciphers

    Master-uppsats, Uppsala universitet/Institutionen för lingvistik och filologi

    Författare :Justyna Sikora; [2022]
    Nyckelord :historical cryptology; historical language models; historical ciphers;

    Sammanfattning : This thesis assesses the influence of language models on decryption of historical German ciphers. Previous research on language identification and cleartext detection indicates that it is beneficial to use historical language models (LM) while dealing with historical ciphers as they can outperform models trained on present-day data. LÄS MER

  7. 5. Evaluating Transcription of Ciphers with Few-Shot Learning

    Master-uppsats, Uppsala universitet/Institutionen för lingvistik och filologi

    Författare :Nikolina Milioni; [2022]
    Nyckelord :Ciphers; Automatic Transcription; Decrypt project; Few-shot learning;

    Sammanfattning : Ciphers are encrypted documents created to hide their content from those who were not the receivers of the message. Different types of symbols, such as zodiac signs, alchemical symbols, alphabet letters or digits are exploited to compose the encrypted text which needs to be decrypted to gain access to the content of the documents. LÄS MER