2 research outputs found
Reversible Data Hiding in Encrypted Text Using Paillier Cryptosystem
Reversible Data Hiding in Encrypted Domain (RDHED) is an innovative method
that can keep cover information secret and allows the data hider to insert
additional information into it. This article presents a novel data hiding
technique in an encrypted text called Reversible Data Hiding in Encrypted Text
(RDHET). Initially, the original text is converted into their ASCII values.
After that, the Paillier cryptosystem is adopted to encrypt all ASCII values of
the original text and send it to the data hider for further processing. At the
data hiding phase, the secret data are embedded into homomorphically encrypted
text using a technique that does not lose any information, i.e., the
homomorphic properties of the Paillier cryptosystem. Finally, the embedded
secret data and the original text are recovered at the receiving end without
any loss. Experimental results show that the proposed scheme is vital in the
context of encrypted text processing at cloud-based services. Moreover, the
scheme works well, especially for the embedding phase, text recovery, and
performance on different security key sizes
A Vision Transformer-Based Approach to Bearing Fault Classification via Vibration Signals
Rolling bearings are the most crucial components of rotating machinery.
Identifying defective bearings in a timely manner may prevent the malfunction
of an entire machinery system. The mechanical condition monitoring field has
entered the big data phase as a result of the fast advancement of machine
parts. When working with large amounts of data, the manual feature extraction
approach has the drawback of being inefficient and inaccurate. Data-driven
methods like the Deep Learning method have been successfully used in recent
years for mechanical intelligent fault detection. Convolutional neural networks
(CNNs) were mostly used in earlier research to detect and identify bearing
faults. The CNN model, however, suffers from the drawback of having trouble
managing fault-time information, which results in a lack of classification
results. In this study, bearing defects have been classified using a
state-of-the-art Vision Transformer (ViT). Bearing defects were classified
using Case Western Reserve University (CWRU) bearing failure laboratory
experimental data. The research took into account 13 distinct kinds of defects
under 0-load situations in addition to normal bearing conditions. Using the
short-time Fourier transform (STFT), the vibration signals were converted into
2D time-frequency images. The 2D time-frequency images are used as input
parameters for the ViT. The model achieved an overall accuracy of 98.8%