Steganography harnesses VoIP networks
نویسندگان
چکیده
Covert channels may be dangerous to company networks as they can lead to the leakage of confidential information. However, it is hard to assess what bandwidth of a covert channel poses a serious threat. Generally, it depends on the security policy that is implemented by the organisation concerned. The ideal case will be to eliminate all possibilities of hidden communication, but practically it is not possible as the number of steganographic techniques is high and still growing rapidly.
منابع مشابه
HIDING DATA IN VoIP
The paper presents and compares steganographic techniques that can be used to enable hidden communication within computer networks. A new class – “steganophony” – of such methods is introduced. Specific methods proposed by the authors – LACK, HICCUPS and SIP-based VoIP protocols’ steganography – are briefly described.
متن کاملLACK - a VoIP Steganographic Method
The paper presents a new steganographic method called LACK (Lost Audio PaCKets Steganography) which is intended mainly for VoIP. The method is presented in a broader context of network steganography and of VoIP steganography in particular. The analytical results presented in the paper concern the influence of LACK’s hidden data insertion procedure on the method’s impact on quality of voice tran...
متن کاملLightweight Security Mechanism for PSTN-IP Telephony Convergence
A new, lightweight security mechanism for the PSTN-VoIP hybrid networks is described. It is based on the two informationhiding techniques: audio watermarking and network steganography. The proposed scheme is suitable especially for the PSTN-IP-PSTN (toll-by-passing) scenario, which nowadays is a very popular application of the IP Telephony systems. Proposed mechanism can be used to authenticate...
متن کاملDST approach to enhance audio quality on lost audio packet steganography
Lost audio packet steganography (LACK) is a steganography technique established on the VoIP network. LACK provides a high-capacity covert channel over VoIP network by artificially delaying and dropping a number of packets in use to convey stegnogram. However, the increasing loss of packets will hurt the quality of the VoIP service. The quality deterioration will not only affect the legitimate V...
متن کاملThe Steganography In Inactive Frames Of Voip
This paper describes a novel high-capacity steganography algorithm for embedding data in the inactive frames of low bit rate audio streams encoded by G.723.1 source codec, which isused extensively in Voice over Internet Protocol (VoIP). This study reveals that, contrary to existing thought, the inactive frames of VoIP streams are more suitable for data embedding than the active frames of the st...
متن کامل