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. 2023;31(S1):55-59.
doi: 10.3233/THC-236006.

Secured computed tomography scanner using a random bit

Hojong Choi  1 , Seung-Hyeok Shin  2
Affiliations

Secured computed tomography scanner using a random bit

Hojong Choi et al. Technol Health Care. 2023.

Abstract

Background: Patient data in current computed tomography scanner machines are transferred through several communication channels, such as WiFi, to the mobile channel platform. Therefore, patient information is an important security concern. Medical imaging must be protected using various methods.

Objective: The current hardware-dependent method for generating random bits exhibits predictable or inconvenient physical characteristics. Therefore, a more flexible random-bit generation technique is to be devised.

Methods: We propose a deterministic random bit generation algorithm that uses a mathematical periodic function.

Results: After randomizing the image using the proposed random bit, the performance is analyzed and compared with that of the processed image.

Conclusion: The random bit generation method using a mathematical algorithm shows higher entropy than the random bit generated by hardware.

Keywords: Computed tomography scanner; digital periodic function; random bit.

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Figures

Figure 1.
Figure 1.
Onetoone mapping function.
Figure 2.
Figure 2.
Periodic function in digital system.
Figure 3.
Figure 3.
(a) Image of random bit based on time stamp and (b) from proposed algorithms. (c) Randomized image obtained using time stamp noise and (d) proposed algorithm.
See this image and copyright information in PMC

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