Security issiues in VOIP Applications
In summary, Man in the Middle attacks create security threats to confidentiality and integrity because this type of attack may release the voice data packets to authorized parties or modify the content of conversations. Security in IPsec IP network is prone to maximum number of security breaches. Hence a lot of network protocols are developed to protect IP networks. Voice Over IP is vulnerable towards the same attack as the normal data traffic. Here the attacker can directly enter the network to disrupt the service or he could generate excess traffic to disrupt the service. IPsec is the preferred form of VPN tunneling across the Internet. There are two basic protocols defined in IPsec: Encapsulating Security Payload (ESP) and Authentication Header (AH). Both schemes provide connectionless integrity, source authentication, and an anti-replay service. IPsec also supports two modes of delivery: Transport and Tunnel. Transport mode encrypts the payload (data) and upper layer headers in the IP packet. The IP header and the new IPsec header are left in plain sight. So if an attacker were to intercept an IPsec packet in transport mode, they could not determine what it contained; but they could tell where it was headed, allowing rudimentary traffic analysis. On a network entirely devoted to VOIP, this would equate to logging which parties were calling each other, when, and for how long. Tunnel mode encrypts the entire IP datagram and places it in a new IP Packet. Both the payload and the IP header are encrypted.Pages: 1 2 3 4 5 [6] 7 8 9 10 11 12 13 14
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