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Record W4405098767 · doi:10.22215/etd/2024-16165

A Collection of New Algorithms in Post-Quantum Cryptography

2024· dissertation· en· W4405098767 on OpenAlexaff
Zachary Donald Welch

Bibliographic record

Venuenot available
Typedissertation
Languageen
FieldComputer Science
TopicCoding theory and cryptography
Canadian institutionsCarleton University
Fundersnot available
KeywordsCryptographyCryptosystemComputer scienceAlgorithmTheoretical computer scienceCryptanalysisBlock cipher

Abstract

fetched live from OpenAlex

In this thesis, we introduce several new algorithms and concepts within the topic of post-quantum cryptography.The security of Hamming weight code-based cryptography is largely based on the effectiveness of information set decoding (ISD) attacks.We introduce a modification to Stern's algorithm that reduces average decryption time by approximately 14% for a code of length 1024, dimension 524 capable of correcting 50 errors.We accomplish this by adding 3 extra columns to the columns reduced to the identity matrix and performing extra row reductions that manipulate the matrix into a form that still allows Stern's algorithm to be run.We introduce a new problem that cryptosystems can be based on, which uses a permutation of vector components to obfuscate ciphertexts.This thesis further introduces a new type of cryptosystem that uses this idea of vector component permutation to obfuscate plaintexts.The system appears resistant to improvements to lattice reduction algorithms and has key sizes that are usable for practical applications.We give a variation of the LWE problem that allows the modulus to be obfuscated.We give a decryption algorithm based on this obfuscated basis LWE and apply it to standard LWE decryption.We show this application and all immediate derivations give no advantages with regard to decryption failure rates of LWE systems.Finally, we show a connection between Module-LWE and Integer Ring-LWE systems and describe an attack that somewhat connects the security of the two systems.16 return {b 1 , b 2 , . . ., b n } 17 k := k + 1 18 go to line 10 // Lines 19-31 swap basis vectors b k and b k-1 to prevent significantly smaller b k from following b k-1 .These lines also update the relevant B i and i,j values.19B 22 B k := B k-1 B k /B 23 B k-1 := B 24 swap b k-1 and b k 14 25 for j between 1 and k -2: 26 swap k-1,j and k,j 27 for i between k + 1 and n:28

Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.

How this classification was reachedexpand

Full frame distilled prediction

Teacher imitation

Not calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.

metaresearch head score (Codex)0.000
metaresearch head score (Gemma)0.000
Version: codex-gemma-dda1882f352aValidation status: machine_predicted_unvalidated
Candidate categoriesnone
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Theoretical or conceptual · Consensus signal: Theoretical or conceptual
GenreCandidate signal: Empirical · Consensus signal: Empirical
Teacher disagreement score0.466
Threshold uncertainty score0.929

Codex and Gemma teacher scores by category

CategoryCodexGemma
Metaresearch0.0000.000
Meta-epidemiology (narrow)0.0000.000
Meta-epidemiology (broad)0.0000.000
Bibliometrics0.0020.003
Science and technology studies0.0000.000
Scholarly communication0.0000.000
Open science0.0010.000
Research integrity0.0000.000
Insufficient payload (model declined to judge)0.0000.000

Machine scores (provisional)

The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.

Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.

Opus teacher head0.011
GPT teacher head0.259
Teacher spread0.248 · how far apart the two teachers sit on this one work
Validation statusscore_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it

Classification

machine, unvalidated

Machine predicted; a candidate call from one teacher head, not a consensus.

The models applied no category: nothing in the taxonomy fit this work.
Study designTheoretical or conceptual
Domainnot available
GenreEmpirical

How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".

Quick stats

Citations0
Published2024
Admission routes1
Has abstractyes

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