  Visual sensors serve as a critical component of the Internet of Things (IoT).
There is an ever-increasing demand for broad applications and higher
resolutions of videos and cameras in smart homes and smart cities, such as in
security cameras. To utilize this large volume of video data generated from
networks of visual sensors for various machine vision applications, it needs to
be compressed and securely transmitted over the Internet. H.266/VVC, as the new
compression standard, brings the highest compression for visual data. To
provide security along with high compression, a selective encryption method for
hiding information of videos is presented for this new compression standard.
Selective encryption methods can lower the computation overhead of the
encryption while keeping the video bitstream format which is useful when the
video goes into untrusted blocks such as transcoding or watermarking. Syntax
elements that represent considerable information are selected for the
encryption, i.e., luma Intra Prediction Modes (IPMs), Motion Vector Difference
(MVD), and residual signs., then the results of the proposed method are
investigated in terms of visual security and bit rate change. Our experiments
show that the encrypted videos provide higher visual security compared to other
similar works in previous standards, and integration of the presented
encryption scheme into the VVC encoder has little impact on the bit rate
efficiency (results in 2% to 3% bit rate increase).
