@inproceedings{772d36eb2ad74d278c49df26daf4a245,
title = "Acquiring hidden space via modifying block bitmap for android devices",
abstract = "Mobile devices are widely used to process sensitive data. In certain situations, the sensitive data must be hidden rather than be encrypted. The existing approaches of setting up hidden space are not suitable for advanced Ext4 file system because they may require external storage device. To address the issue, we propose a novel method to establish the hidden space in Ext4 via artificially modifying the block bitmaps. To further improve usefulness of our method, we modify the multiply bits of the block bitmaps one time by creating a “host file” rather than by bit. This method is lightweight and does not require modifying the linux kernel and has no effect on the normal operations of the operating system. To validate the method performance, distributions of hidden spaces under different storage capacity are conducted. The results show that our method is effective and reliable.",
keywords = "Block bitmap, Ext4, Hidden space",
author = "Wang Lianfang and Huang Hong and Li Yuanzhang and Zhang Li",
note = "Publisher Copyright: {\textcopyright} Springer Nature Switzerland AG 2018.; 18th International Conference on Algorithms and Architectures for Parallel Processing, ICA3PP 2018 ; Conference date: 15-11-2018 Through 17-11-2018",
year = "2018",
doi = "10.1007/978-3-030-05057-3_49",
language = "English",
isbn = "9783030050566",
series = "Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)",
publisher = "Springer Verlag",
pages = "651--660",
editor = "Jaideep Vaidya and Jin Li",
booktitle = "Algorithms and Architectures for Parallel Processing - 18th International Conference, ICA3PP 2018, Proceedings",
address = "Germany",
}