Veri Gizlemede Kaotik fonksiyonlar ve XOR İşlemi Tabanlı Etkili bir Steganografi Yöntemi

Year 2024, Volume: 5 Issue: 2, 59 - 66, 31.12.2024

Selman Yakut

https://doi.org/10.54047/bibted.1593334

Abstract

Gelişen teknoloji ve dijitalleşen dünya, güvenli veri iletiminin önemini artırmaktadır. Steganografi, verilerin güvenli bir şekilde iletilmesini ele alan ve veri güvenliğinin kritik bir parçasını oluşturan bir tekniktir. Türkçe'de "gizli yazı" anlamına gelen steganografi, gizlenmek istenen verinin taşıyıcı bir veri aracılığıyla aktarılması esasına dayanır. Tarihsel olarak ilkel yöntemlerle uygulanan steganografi, dijitalleşen dünya ile birlikte modern tekniklerin ve yöntemlerin kullanımına geçiş yapmıştır. Bu çalışmada, kaotik fonksiyonlar ve XOR işlemi tabanlı bir steganografi yöntemi önerilmektedir. Önerilen yöntem iki aşamadan oluşmaktadır. Birinci aşama olan veri gömme işleminde, gizlenecek veri önce ikilik formata dönüştürülür. Ardından bu veri, tent map dizisi ile XOR işlemine tabi tutulur. Bu işlem sonucunda elde edilen nihai veri, logistic map kullanılarak gri seviye bir görüntünün gömüleme pozisyonları belirlenerek yerleştirilir. İkinci aşama olan veri çıkarma işleminde, logistic map yardımıyla gömülü mesaj çıkarılır ve çıkarılan bu mesaj tent map ile XOR işlemine tabi tutularak orijinal veri elde edilir. Önerilen yöntemin etkinliği, literatürdeki görüntüler üzerinde gerçekleştirilen PSNR, MSE ve SSIM gibi metriklerle test edilmiştir. Sonuçlar, yöntemin steganaliz tekniklerine karşı dayanıklı bir yapı sunduğunu ve güvenlik parametrelerini sağladığını göstermiştir.

Keywords

Steganografi, Kaotik fonksiyonlar, Logistic harita, Tent harita

An Efficient Steganography Method Based on Chaotic Functions and XOR Operation for Data Hiding

Abstract

The advancing technology and digitalizing world have increased the importance of secure data transmission. Steganography, a technique that ensures secure data communication, is a critical component of data security. Derived from the term meaning "hidden writing" in Turkish, steganography is based on the principle of embedding the data to be hidden into a carrier medium. While historically applied using primitive methods, steganography has transitioned to the use of modern techniques and methods in today’s digitalized era. In this study, a steganography method based on chaotic functions and the XOR operation is proposed. The proposed method consists of two stages. In the first stage, data embedding, the data to be hidden is first converted into binary format. This binary data is then subjected to an XOR operation with a tent map sequence. The resulting final data is embedded into a grayscale image by determining its embedding positions using a logistic map. In the second stage, data extraction, the embedded message is retrieved using the logistic map, and the extracted message is XORed with the tent map to recover the original data. The effectiveness of the proposed method was evaluated using commonly employed metrics such as PSNR, MSE, and SSIM on images in the literature. The results demonstrate that the proposed method offers a robust structure against steganalysis techniques while ensuring critical security parameters.

Keywords

Steganography, Chaotic functions, Logistic Map, Tent Map

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