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    Гл. ас. д-р Цветелина Росенова Добрева
    Гл. ас. д-р Цветелина Росенова Добрева

    Факултет: Факултет по математика и информатика

    Катедра: КОМПЮТЪРНА ИНФОРМАТИКА

    Кабинет: Корпус 3, стая 218

    Телефон:

    Email: ts.dobreva@shu.bg

    Приемно време: 2024/2025 1-ви сем. I седмица: четвъртък 9:00 - 11:00, II седмица: сряда 10:00 - 12:00

    2022 Изследване на криптираща функция за защита на звукови файлове
    2025 B. Stoyanov, T. Ivanova and P. Ivanov, Trikeda: Audio Ciphering Using Triple Ikeda Map, 2025 International Conference on Information Technologies (InfoTech), Sofia, Bulgaria, 2025, pp. 1-4, doi: 10.1109/InfoTech67177.2025.11175949.
    2025 T. Ivanova, D. Dobrev and M. Aleksandrova, Applications of Pseudorandom Number Generator in Selected Stochastic Simulations, 2025 International Conference on Information Technologies (InfoTech), Sofia, Bulgaria, 2025, pp. 1-4, doi: 10.1109/InfoTech67177.2025.11175971.
    2024 Image compression-then-encryption model based on A1 attractor, Tsvetelina Ivanova, Dimitar Dobrev, Borislav Stoyanov and Plamen Ribarski,IEEE INTERNATIONAL CONFERENCE AUTOMATICS AND INFORMATICS’2024 (ICAI’24), 10 - 12 October 2024, VARNA (Technical University of Varna), http://icai-conf.org, program: http://icai-conf.org/images/programa/icai24_program_20241010.pdf
    2024 Flogista: audio encryption with filtered triple Logistic map, Borislav Stoyanov, Tsvetelina Ivanova, Dimitar Dobrev and Plamen Ribarski, IEEE INTERNATIONAL CONFERENCE AUTOMATICS AND INFORMATICS’2024 (ICAI’24), 10 - 12 October 2024, VARNA (Technical University of Varna), http://icai-conf.org, program: http://icai-conf.org/images/programa/icai24_program_20241010.pdf
    2024 Dobrev, D., & Ivanova, T. (2024). Audio encryption algorithm employing data-parallel approach. Mathematical and Software Engineering, 10(1-2), 1-12.
    2023 Stoyanov B, Nedzhibov G, Dobrev D, Ivanova T. Application of Decimated Mathematical Equations and Polynomial Root-Finding Method in Protection of Text Messages. Mathematics. 2023; 11(24):4982. https://doi.org/10.3390/math11244982
    2023 T. Ivanova, B. Stoyanov and D. Dobrev, \"Secure Text Encryption Based on Clifford Attractors,\" 2023 31st National Conference with International Participation (TELECOM), Sofia, Bulgaria, 2023, pp. 1-4, doi: 10.1109/TELECOM59629.2023.10409685.
    2021 Stoyanov, Borislav, and Tsvetelina Ivanova. „Pseudorandom Byte Generator based on Shrinking 128-bit Chaotic Function.“ AIP Conference Proceedings. Vol. 2333. No. 1. AIP Publishing, 2020 SJR 2019 = 0.190, https://doi.org/10.1063/1.5130873
    2021 Stoyanov B, Ivanova T. Novel Implementation of Audio Encryption Using Pseudorandom Byte Generator (2021) Applied Sciences. 2021; 11(21):10190. https://doi.org/10.3390/app112110190, IF 2020 = 2.679, WoS, SJR 2020 = 0.435, Scopus.
    2021 Stoyanov, B., Ivanova, T., Todorova, M., Cholakov, M., Ahmed, H. (2021) Extended Security Analysis of the Zaslavsky Maps Based Pseudorandom Byte Generator, CEUR Workshop Proceedings 2933, 265–269, SJR 2020 = 0.177, Scopus, http://ceur-ws.org/Vol-2933/paper26.pdf https://www.scopus.com/record/display.uri?eid=2-s2.0-85113359388&origin=resultslist (The 14-th Conference on Information Systems and Grid Technologies (ISGT 2021), May 28-29, 2021, Sofia, Bulgaria.).
    2021 Ivanova, T. (2021) Overview of Cryptographic Algorithms for Audio Files and their Properties, Annual of Konstantin Preslavsky University of Shumen, XXII C, 23-31, http://info.fmi.shu-bg.net/skin/pfiles/23_31_analys_crypt_2021.pdf.
    2019 Stoyanov, B., and Ivanova, T. (2019, November) CHAOSA: Chaotic map based random number generator on Arduino platform. In AIP Conference Proceedings (Vol. 2172, No. 1, p. 090001). AIP Publishing.
    2019 Stoyanov, B., Todorova, M., Ivanova, T., Borboryan, G., and Hasanov, A. (2019, October). Two Zaslavsky maps in pseudorandom byte generation. In AIP Conference Proceedings (Vol. 2164, No. 1, p. 120013). AIP Publishing.
    2025 B. Stoyanov, T. Ivanova and P. Ivanov, \"Trikeda: Audio Ciphering Using Triple Ikeda Map,\" 2025 International Conference on Information Technologies (InfoTech), Sofia, Bulgaria, 2025, pp. 1-4, doi: 10.1109/InfoTech67177.2025.11175949.
    2025 T. Ivanova, D. Dobrev and M. Aleksandrova, \"Applications of Pseudorandom Number Generator in Selected Stochastic Simulations,\" 2025 International Conference on Information Technologies (InfoTech), Sofia, Bulgaria, 2025, pp. 1-4, doi: 10.1109/InfoTech67177.2025.11175971.\"
    2024 Image compression-then-encryption model based on A1 attractor, Tsvetelina Ivanova, Dimitar Dobrev, Borislav Stoyanov and Plamen Ribarski,IEEE INTERNATIONAL CONFERENCE AUTOMATICS AND INFORMATICS’2024 (ICAI’24), 10 - 12 October 2024, VARNA (Technical University of Varna), http://icai-conf.org, program: http://icai-conf.org/images/programa/icai24_program_20241010.pdf
    2024 Flogista: audio encryption with filtered triple Logistic map, Borislav Stoyanov, Tsvetelina Ivanova, Dimitar Dobrev and Plamen Ribarski, IEEE INTERNATIONAL CONFERENCE AUTOMATICS AND INFORMATICS’2024 (ICAI’24), 10 - 12 October 2024, VARNA (Technical University of Varna), http://icai-conf.org, program: http://icai-conf.org/images/programa/icai24_program_20241010.pdf
    2022 Анализ на криптиращи функции за звукови файлове (Analysis of audio file encryption functions) в НАУЧНА КОНФЕРЕНЦИЯ С МЕЖДУНАРОДНО УЧАСТИЕ МАТТЕХ 2022
    2019 Изнасяне на доклад на тема Chaotic map based random number generator on Arduino platform на международна конференция „Приложение на математиката в техниката и икономиката (AMEE’19)“
    2018 Участие в НАУЧНА КОНФЕРЕНЦИЯ С МЕЖДУНАРОДНО УЧАСТИЕ МАТТЕХ 2018 с доклад на тема „Криптографски анализ на паралелни алгоритми за защита на изображения“
    2025 Secure text encryption based on clifford attractors
    Цитира се в:
    1. Sharma, P. L., Gupta, S., Monga, H., Nayyar, A., Gupta, K., & Sharma, A. K. (2025). TEXCEL: text encryption with elliptic curve cryptography for enhanced security. Multimedia Tools and Applications, 84(13), 11503-11531.

    2. Kinganga, J., Kasoro, N., & Musesa, A. (2025). Dynamics data encryption based on chaotic functions and elliptic curves: Application to text data. Al-Mustansiriyah Journal of Science, 36(1), 56-68.

    3. Gupta, S., Narang, R., Patel, M. K., Gupta, K., & Kumar, K. Enhanced ECC-driven Text Encryption Scheme using Chaotic Maps and Rhotrices. Palestine journal of Mathematics
    2025 CHAOSA: Chaotic map based random number generator on Arduino platform
    Цитира се в:
    1. Laskaridis, L., Volos, C., Giakoumis, A. E., Meletlidou, E., & Stouboulos, I. (2025). Dynamical investigation of a modified Cubic map with a discrete memristor using microcontrollers. Electronics, 14(2), 311.

    2. Ahmad Mir, S., & Sharma, P. (2025). Randomness from Deterministic Chaos: A Novel Algorithm for Random Number Generation. In International Conference on Computational Science and Its Applications (pp. 21-35). Springer, Cham.
    2025 Novel implementation of audio encryption using pseudorandom byte generator
    Цитира се в:
    1. Fotso, S. B. N., Atchoffo, W. N., Nzeukou, A. C., & Talla Mbe, J. H. (2025). Enhanced security in lossless audio encryption using zigzag scrambling, DNA coding, SHA-256, and Hopfield networks: a practical VLC system implementation. Multimedia Tools and Applications, 84(23), 27091-27125.

    2. Lawnik, M., Moysis, L., Garcia-Grimaldo, C., Campos-Canton, E., Fragulis, G. F., & Volos, C. (2025). Generalized Vertigo Maps—A New Family of Chaotic Maps with Robust Chaos but Without Fixed Points. International Journal of Bifurcation and Chaos, 35(05), 2530012.

    3. Helmy, M. (2025). Audio transmission based on hybrid crypto-steganography framework for efficient cyber security in wireless communication system. Multimedia Tools and Applications, 84(18), 18893-18917.

    4. Nassef, M. (2025). An Intelligent Audio Encryption and Compression Algorithm Inspired by the Encoding of Various Biological Sequences. IEEE Access.
    2025 Novel implementation of audio encryption using pseudorandom byte generator
    Цитира се в:
    1. Helmy, M., & Torkey, H. (2025). Secured Audio Framework Based on Chaotic-Steganography Algorithm for Internet of Things Systems. Computers, 14(6), 207.

    2. Khushal Patil, L., & Popat, K. A. (2025). A Multilayered Encryption for the Robust Design and Implementation of Secure Audio Files. SN Computer Science, 6(5), 460.

    3. Mousa, A. N. A., Muhammed, A. A. I., & Salem, A. M. TWO WAYS OF MESSAGE BLOCKS REARRANGEMENT TO PROTECT THE MESSAGE.
    2024 CHAOSA: Chaotic map based random number generator on Arduino platform Цитира се в: Naik, R. B., & Singh, U. (2024). A review on applications of chaotic maps in pseudo-random number generators and encryption. Annals of Data Science, 11(1), 25-50. IF(2023) = 3.42, SJR = 0.609
    2024 CHAOSA: Chaotic map based random number generator on Arduino platform Цитира се в: Saeed, H., Diab, T. O., & Elsisi, M. A. (2024, July). Chaotic Maps in Cryptography. In 2024 International Telecommunications Conference (ITC-Egypt) (pp. 635-645). IEEE.
    2024 Novel implementation of audio encryption using pseudorandom byte generator Цитира се в: Fotso, S. B. N., Atchoffo, W. N., Nzeukou, A. C., & Talla Mbe, J. H. (2024). Enhanced security in lossless audio encryption using zigzag scrambling, DNA coding, SHA-256, and hopfield networks: a practical vlc system implementation. Multimedia Tools and Applications, 1-35. SJR = 0.801, IF(2023) = 4.53
    2024 Novel implementation of audio encryption using pseudorandom byte generator Цитира се в: Joshi, A. B., & Gaffar, A. (2024). A technique for securing digital audio files based on rotation and XOR operations. Soft Computing, 28(6), 5523-5540. IF = 3.1, SJR = 0.810
    2024 Novel implementation of audio encryption using pseudorandom byte generator Цитира се в: Demirtas, M. (2024, May). A Sound Encryption Method Based on Feature Extraction and a Novel Chaotic Map. In Proceedings of the 2024 10th International Conference on Computer Technology Applications (pp. 303-309).
    2024 Novel implementation of audio encryption using pseudorandom byte generator Цитира се в: Babaleshwar, V. K., KARADE, S., NAIDU, A. (2024). AUDIO ENCRYPTION AND DECRYPTION USING AES ALGORITHM TECHNIQUE. i-managers Journal on Electronics Engineering, 14(2).
    2024 Secure text encryption based on clifford attractors. Цитира се в: Sharma, P. L., Gupta, S., Monga, H., Nayyar, A., Gupta, K., & Sharma, A. K. (2024). TEXCEL: text encryption with elliptic curve cryptography for enhanced security. Multimedia Tools and Applications, 1-29. SJR = 0.810, IF = 2.9
    2024 CHAOSA: Chaotic map based random number generator on Arduino platform Цитира се в: Laskaridis, L., Volos, C., Giakoumis, A., Nistazakis, H., Antoniades, I. P., & Stouboulos, I. (2024, March). A Microcontroller Implementation of a Pseudo-random Bit Generator based on a 2D Discrete Memristive Hyperchaotic Map. In 2024 Panhellenic Conference on Electronics & Telecommunications (PACET) (pp. 1-4). IEEE.
    2024 Novel implementation of audio encryption using pseudorandom byte generator Цитира се в: Helmy, M. (2024). Audio Transmission Based on Hybrid Crypto-steganography Framework for Efficient Cyber Security in Wireless Communication System. Multimedia Tools and Applications, 1-25. SJR = 0.810, IF = 2.9