Iranian Society of Cryptology The ISC International Journal of Information Security 2008-2045 18 3 2026 07 01 Time-Based Steganography in Text 307 312 242053 10.22042/isecure.2026.242053 EN Zahra Ghoraeian Department of Mathematics and Computer Science, Amirkabir University of Technology – Tehran Polytechnic, Tehran, Iran. Mohammad Reza Sadeghi Department of Mathematics and Computer Science, Amirkabir University of Technology – Tehran Polytechnic, Tehran, Iran. Samaneh Mashhadi School of Mathematics and Computer Science, Iran University of Science and Technology, Narmak, Tehran, Iran. Journal Article Preserving data confidentiality is crucial in today’s digital world where data exchange is increasingly becoming digital. This paper presents a novel text steganography algorithm. Initially, the secret message is converted into a bit stream. This bit stream is then shuffled using a random sequence to enhance security. Finally, the data is converted into a specific ”time” (including date and hour), and this generated time is embedded within a suitable cover text. The results demonstrate that the proposed algorithm is robust against a variety of attacks, including retyping, OCR, printing and photocopying, compression, document feature modification, non-Unicode environment conversion, and semantic paraphrasing. The algorithm is language-independent and applicable to all languages. The scheme exhibits high transparency against visual and machine attacks and has a capacity of 18 bits per time. The embedding of information bits using a random sequence enhances the scheme’s resistance against detection attacks. https://www.isecure-journal.com/article_242053_25085cc14cae6342ec2a417c93d9ccc8.pdf