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• MODEL OF AN ELECTRONIC VOTING SCHEME WITH THE POSSIBILITY OF CHANGING THE PARTICIPANT'S DECISION BEFORE THE END OF VOTING

  Z.N. Dakuo , S.V. Bezzateev , V. V. Davydov , I.D. Ioganson , А.F. Khutsaeva

  201-212

  2026-09-10

  Abstract ▼

  Existing electronic voting protocols often feature an architecture where ballot submission is an irreversible action. This significantly reduces system usability, depriving the participant of the right to correct an accidental error or change their opinion during lengthy decision-making procedures. The aim of the work is to develop a model of a cryptographic protocol that provides a native capability for multiple decision changes to enhance usability while maintaining strict anonymity and counting correctness.
  The architecture is based on the integration of a trapdoor commitment scheme to implement choice flexibility, a verifiable random function (VRF) for ballot generation, the Privacy Pass protocol for anonymous authorization, and mix-networks. An electronic voting protocol has been developed that implements the possibility for a participant to change their decision multiple times. The fulfillment of basic and some extended security properties, including, but not limited to, participant confidentiality and universal verifiability, has been theoretically proven. It is shown that, unlike existing analogs, changing a decision in the proposed model does not require repeating a complex authentication procedure or key revocation, which minimizes the number of interactive user actions. The proposed solution aligns the user experience of secure voting with the standards of modern digital services by providing a choice editing function, thereby increasing the convenience of the voting procedure for participants. The modular structure of the model allows for the application of any robust cryptographic algorithms, including post-quantum ones

• ALGORITHM OF ENSURING THE SECURITY OF CONFIDENTIAL DATA OF THE MEDICAL INFORMATION SYSTEM FOR STORAGE AND PROCESSING OF EXAMINATION RESULTS

  L.K. Babenko, A.S. Shumilin, D.M. Alekseev

  2021-01-19

  Abstract ▼

  The objectives of the study are to develop and assess the effectiveness of the structure of a
  cloud platform for storing, processing and organizing medical data, determining a method of protection,
  in particular, ensuring confidentiality when transferring and storing examination results.
  To achieve this goal, the tasks of analyzing existing models of information processes and structures
  in the subject area are being solved, the features of the means for accumulating and processing medical data stored in electronic information systems for patient registration, the architecture
  of a cloud platform for distributed data storage and an algorithm for ensuring the safety of
  medical data stored in the cloud are being developed. the platform in electronic form in the form
  of initial physiological signals (EEG, ECG, EMG, EOG, etc.) recorded during patient examinations;
  an integrated cloud platform for distributed storage, analysis and systematization of medical
  data and a security system using the developed protection method are being created; the effectiveness
  of the proposed algorithm for protecting confidential medical information is analyzed in the
  context of integration into the developed cloud platform. The proposed method for protecting a
  medical information system involves the use of an original DICOM file and subsequently a converted
  PNG image, which is subjected to a pixel encryption algorithm. An algorithm based on
  chaos theory is used to encrypt the image. The capabilities of chaos systems can significantly increase
  productivity. Hierarchical division of data streams into levels and standardization of data
  transfer protocols, as well as their storage formats, allow to form a universal, flexible and reliable
  medical information system. The proposed architecture has the ability to integrate into existing
  medical systems. In the course of the work, it was found that the considered protection method is
  an effective way to ensure the confidentiality of medical system data.

• ALGORITHM OF PROTECTING CONFIDENTIAL DATA IN THE CLOUD MEDICAL INFORMATION SYSTEM

  L.K. Babenko, A.S. Shumilin, D.M. Alekseev

  2021-12-24

  Abstract ▼

  The aim of the work is the development and implementation of the architecture of a cloud
  storage system, systematization and processing of survey results (for example, EEG) and an algorithm
  for ensuring the protection of confidential data based on a completely homomorphic cryptosystem.
  The object of the research is the technologies of storage, transmission, processing and
  protection of confidential information in distributed medical information systems. The architecture
  of a cloud platform for distributed storage, processing, systematization and protection of confidential
  data (results of medical examinations) has been developed, which makes it possible to interact
  with various medical information systems and diagnostic hardware in order to generate big data.
  An algorithm has been developed to ensure the safety of medical data stored in a cloud platform in electronic form, recorded during patient examinations in order to calculate the average value for
  each of the brain activity rhythms (based on the results of a series of examinations over a long
  period of time) using a fully homomorphic encryption algorithm. Based on the test results (analysis
  of the execution time of such operations as: encryption, decryption, addition, multiplication,
  signal-to-noise ratio of ciphertext to plaintext), the optimal algorithm. According to the results of
  the work, it is shown that the fully homomorphic encryption scheme CKKS is the most effective,
  especially in the context of the criticality of the requirements for a high level of security of confidential
  data, which determines the choice of this scheme for the implementation of the algorithm
  proposed in this work.