SCADA stands for supervisory control and data acquisition. SCADA networks control and monitor the critical utility and process control infrastructures for manufacturing, production, and power generation for utility companies, including electricity, natural gas, oil, water, sewage, and railroads. The development of SCADA can be traced back to the beginning of the 19 th century through … Read more
To protect against VoIP attacks, you should follow the same conventional methods and security best practices that you use for any other software segment. Test your system thoroughly via penetration testing and implement a strategy of defense in depth that encompasses the entire system. Defense in depth is achieved by • Making it harder for … Read more
VoIP architectures and services are prone to several types of attacks. These can be categorized into vulnerabilities or exploits that violate any of the CIA (confidentiality, integrity, and availability) tenants, detailed here: • Confidentiality Attacks include eavesdropping, packet sniffing, password cracking, social engineering, information leakage • Integrity Attacks include message, log, and configuration tampering, and … Read more
VoIP, or Voice over Internet Protocol, is a type of transmissions medium that is responsible for the delivery of real-time voice and data communication. Unlike its analog predecessor in which the transport functionality was routed via the public switched telephone network (PSTN), calls are now converted from an analog signal to a digital format, which … Read more
Ekiga, an open source alternative to Skype, offers a similar feature set. It can be installed using the Ubuntu Software Center and is available from Applications ➤ Internet ➤ Ekiga Softphone. When the software is launched for the first time, you’ll be prompted to create an Ekiga.net account, which will give you a SIP address … Read more
G.711 Codec G.711 is a codec that was introduced by ITU in 1972 for use in digital telephony. The codec has two variants: A-Law is being used in Europe and in international telephone links, uLaw is used in the U.S.A. and Japan. G.711 uses a logarithmic compression. It squeezes each 16-bit sample to 8 bits, thus it achieves a … Read more