Assessment of uniformity of byte distribution in a file based on the wavelet transform as an approach to search encrypted data
by Vesta Matveeva
International Journal of Electronic Security and Digital Forensics (IJESDF), Vol. 7, No. 2, 2015

Abstract: This article is focused on the search of the encrypted data in the file system, which is an important step in digital forensics. Encryption is widely used today, among others by malefactors to conceal data, suggesting that encrypted information can be hidden in the file system. There are means of detection of encrypted files, but they have significant limitations and may not be used for the free space of the file system. Statistical tests can also be used for this purpose but they are resource and time consuming. Therefore, the article proposes a new approach to searching for encrypted data, based on the assessment of uniformity of data, with the ability to localise the heterogeneity, which reduces type I error to zero. This approach has its drawbacks, in the form of type II errors; however it can be improved by manipulating parameters that are used for assessment of uniformity.

Online publication date: Thu, 28-May-2015

The full text of this article is only available to individual subscribers or to users at subscribing institutions.

Existing subscribers:
Go to Inderscience Online Journals to access the Full Text of this article.

Pay per view:
If you are not a subscriber and you just want to read the full contents of this article, buy online access here.

Complimentary Subscribers, Editors or Members of the Editorial Board of the International Journal of Electronic Security and Digital Forensics (IJESDF):
Login with your Inderscience username and password:

    Username:        Password:         

Forgotten your password?

Want to subscribe?
A subscription gives you complete access to all articles in the current issue, as well as to all articles in the previous three years (where applicable). See our Orders page to subscribe.

If you still need assistance, please email