出版社：National Defense University Barbaros Naval Sciences and Engineering Institute Journal of Naval Science and Engineering
摘要：In this paper,a secure phone system implemented over Public Switched Telephone Network (PSTN).Speech data is sent through a dial-up modem over PSTN to receiver after converted digital form and ciphered.In this study,Scalable Encryption Algorithm (SEA) is used.SEA is developed for systems have low level memory and low power process.Also in this system,a text file can be embedded into speech data before encrypted voice data.By this means,security of system is increased.During a text file is embedding into speech data,distortion in speech data is kept low level according to Human Auditory System (HAS).Even if eavesdroppers can get decrypted speech data they must detect hidden data in speech data.And then malicious people have to use steganalysis techniques to get secret data.
其他摘要：Bu çalışmada Public Switched Telephone Network (PSTN) üzerinden güvenli haberleşme amaçlı bir sistem gerçekleştirilmiştir.Konuşma sinyali dijital sinyale çevrilip şifrelendikten sonra bir dial up modem aracılığıyla PSTN üzerinden alıcıya gönderilmektedir.
