Signaling in telecommunication networks. John Wiley &amp; Sons, 1997

Bosse, John G. van; Pattavina, Achille

doi:10.1002/ett.4460090509

Cited by 5 publications

(8 citation statements)

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“…For example, Useruser Information is a variable length optional IAM parameter used in countries that offer user-to-user signaling of ISDN users. The parameter contents are not specified by ITU-T, and are coded as agreed by individual user pairs [2]. Generally carrier service providers in USA, mutually agree to prohibit use of this parameter, so any IAM message containing this parameter is syntactically well formed but still considered incorrect.…”

Section: Security Goalsmentioning

confidence: 99%

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Securing VoIP and PSTN from integrated signaling network vulnerabilities

Sengar

Dantu²,

Wijesekera³

2006

1st IEEE Workshop on VoIP Management and Security, 2006.

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The liberalization of public switched telephone network (PSTN) and growing acceptance of SIGTRAN protocol suite have introduced new and yet to be trusted signaling entities. Thus security threats emerging from one network not only affects itself but other network also. We show how this integrated signaling environment can become a security threat to emerging VoIP and PSTN networks. We propose a security solution as a fix. Our proposal goes beyond "Gateway Screening" and "SS7 Gatekeeper" proposed by Telcordia and Verizon respectively to defend vulnerable SS7 network.

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Section: Security Goalsmentioning

confidence: 99%

“…STPs provide routing functions and therefore user parts are absent. Detailed description of the SS7 protocol stack can be found in [1], [2].…”

Section: Introductionmentioning

confidence: 99%

Securing VoIP and PSTN from integrated signaling network vulnerabilities

Sengar

Dantu²,

Wijesekera³

2006

1st IEEE Workshop on VoIP Management and Security, 2006.

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“…Out-ofband signaling now controls the majority of PTN functions. Out-of-band communication between PTN central-office switches occurs via dedicated (private and public) X.25 data networks using special protocols, e.g., the SS7 protocol for setting up and tearing down ocalls, establishing billing and returning busy signals [2,17]. Such dedicated networks prevent in-band fraud, while conserving telecommunications resources [18] .Even so, new telecommunications technologies often revert to in-band signaling.…”

Section: Signalingmentioning

confidence: 99%

<title>Characterization of attacks on public telephone networks</title>

Lorenz

Manes

Hale

et al. 2001

Enabling Technologies for Law Enforcement and Security

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The U.S. Public Telephone Network (PTN) is a massively connected distributed information system, much like the Internet. PTN signaling, transmission and operations functions must be protected from physical and cyber attacks to ensure the reliable delivery of telecommunications services. The increasing convergence of PTNs with wireless communications systems, computer networks and the Internet itself poses serious threats to our nation's telecommunications infrastructure. Legacy technologies and advanced services encumber well-known and as of yet undiscovered vulnerabilities that render them susceptible to cyber attacks. This paper presents a taxonomy of cyber attacks on PTNs in converged environments that synthesizes exploits in computer and communications network domains. The taxonomy provides an opportunity for the systematic exploration of mitigative and preventive strategies, as well as for the identification and classification of emerging threats.

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“…For example, User-user Information is a variable length optional IAM parameter used in countries that offer user-to-user signaling of ISDN users. The parameter contents are not specified by ITU-T, and are coded as agreed by individual user pairs [2]. Generally carrier service providers mutually agree to prohibit use of this parameter, so any IAM message containing this parameter is syntactically well formed but still considered incorrect.…”

Section: Authentication Goalmentioning

confidence: 99%

MTPSec: Customizable Secure MTP3 Tunnels in the SS7 Network

Sengar

Wijesekera

Jajodia

19th IEEE International Parallel and Distributed Processing Symposium

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The signaling system 7 (SS7) is the control network used by public telephones all over the world. Having been designed in an era where few large companies controlled the entire network, SS7 has virtually no security. Due to telecommunication deregulation, liberalization of economies and the convergence of telephone, IP and wireless networks, interfaces to SS7 has increased. We show how these deficiencies can be exploited to isolate or shut down telephone switches. As a solution, we propose MTPSec -a framework that enforces authentication and custom creates secure channels at the message transfer part level 3 (MTP3) layer. We show by simulation that employing MTPSec adds only 360 µ seconds to an average call setup time delays to a domestic telephone call in an average sized country. It is quite tolerable for getting an additional security service given that the current connection delays are between 2.0 to 2.5 seconds.

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Signaling in telecommunication networks. John Wiley & Sons, 1997

Cited by 5 publications

References 0 publications

Securing VoIP and PSTN from integrated signaling network vulnerabilities

Securing VoIP and PSTN from integrated signaling network vulnerabilities

<title>Characterization of attacks on public telephone networks</title>

MTPSec: Customizable Secure MTP3 Tunnels in the SS7 Network

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