This paper proposes a self-embedding fragile watermarking scheme in encrypted speech
based on hyper-chaotic system and reference sharing mechanism. Hyper-chaotic system is
introduced to hide the feature and improve the confidentiality of original speech. Reference
sharing mechanism is used to generate watermark for recovering tampered speech area.
Combining the encryption and watermarking technologies, the confidentiality and integrity of
original speech can be achieved simultaneously. Analysis and experimental results …

Speech Authentication and Recovery Scheme in Encrypted Domain — University of
Southern Denmark … Speech Authentication and Recovery Scheme in Encrypted Domain …