document: New voice over Internet protocol technique with hierarchical data security protection The authors propose a voice over Internet protocol -LRB- VoIP -RRB- technique with a new hierarchical data security protection -LRB- HDSP -RRB- scheme . The proposed HDSP scheme can maintain the voice quality degraded from packet loss and preserve high data security . It performs both the data inter-leaving on the inter-frame of voice for achieving better error recovery of voices suffering from continuous packet loss , and the data encryption on the intra-frame of voice for achieving high data security , which are controlled by a random bit-string sequence generated from a chaotic system . To demonstrate the performance of the proposed HDSP scheme , we have successfully verified and analysed the proposed approach through software simulation and statistical measures on several test voices
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