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Towards Mitigating Unwanted Calls in Voice Over IP
FACULDADE DE ENGENHARIA DA UNIVERSIDADE DO PORTO Towards Mitigating Unwanted Calls in Voice Over IP Muhammad Ajmal Azad Programa Doutoral em Engenharia Electrotécnica e de Computadores Supervisor: Ricardo Santos Morla June 2016 c Muhammad Ajmal Azad, 2016 Towards Mitigating Unwanted Calls in Voice Over IP Muhammad Ajmal Azad Programa Doutoral em Engenharia Electrotécnica e de Computadores June 2016 I Dedicate This Thesis To My Parents and Wife For their endless love, support and encouragement. i Acknowledgments First and foremost, I would like to express my special gratitude and thanks to my advisor, Professor Dr. Ricardo Santos Morla for his continuous support, supervision and time. His suggestions, advice and criticism on my work have helped me a lot from finding a problem, design a solution and analyzing the solution. I am forever grateful to Dr. Morla for mentoring and helping me throughout the course of my doctoral research.. I would like to thanks my friends Dr. Arif Ur Rahman and Dr. Farhan Riaz for helping in understanding various aspects of research at the start of my Ph.D, Asif Mohammad for helping me in coding with Java, and Bilal Hussain for constructive debate other than academic research and continuous encouragements in the last three years. Of course acknowledgments are incomplete without thanking my parents, family members and loved ones. I am very thankful to my parents for spending on my education despite limited resources. They taught me about hard work, make me to study whenever I run away, encourage me to achieve the goals, self-respect and always encourage me for doing what i want. -
Address Munging: the Practice of Disguising, Or Munging, an E-Mail Address to Prevent It Being Automatically Collected and Used
Address Munging: the practice of disguising, or munging, an e-mail address to prevent it being automatically collected and used as a target for people and organizations that send unsolicited bulk e-mail address. Adware: or advertising-supported software is any software package which automatically plays, displays, or downloads advertising material to a computer after the software is installed on it or while the application is being used. Some types of adware are also spyware and can be classified as privacy-invasive software. Adware is software designed to force pre-chosen ads to display on your system. Some adware is designed to be malicious and will pop up ads with such speed and frequency that they seem to be taking over everything, slowing down your system and tying up all of your system resources. When adware is coupled with spyware, it can be a frustrating ride, to say the least. Backdoor: in a computer system (or cryptosystem or algorithm) is a method of bypassing normal authentication, securing remote access to a computer, obtaining access to plaintext, and so on, while attempting to remain undetected. The backdoor may take the form of an installed program (e.g., Back Orifice), or could be a modification to an existing program or hardware device. A back door is a point of entry that circumvents normal security and can be used by a cracker to access a network or computer system. Usually back doors are created by system developers as shortcuts to speed access through security during the development stage and then are overlooked and never properly removed during final implementation. -
Technical Means to Combat Spam in the Voip Service
Section Four Technical Means to Combat Spam in the VoIP Service Spam refers in general to any unsolicited communication. Spam will also become one of the serious problems for multimedia communication in the near future. Spam in multimedia communication is referred to as SIP spam or SPIT (Spam over Internet Telephony), where SIP is used to manage the session between two end users. In this paper, the types of SIP spam are introduced and various pragmatic solutions applicable to combat the SIP spams are described including content filtering, white list, black list, and the reputation system. Finally, the detailed operation and principles for the authenticated identity in SIP header, which is a prerequisite for the solutions above, are also described. The possible solutions to combat the SIP spasm have been listed and the background technology to those solutions, an authenticated identity between the domains, is also introduced. Heung Youl Youm (PhD) Professor, Soonchunhyang University, South Korea Rapporteur, Q.9/SG17, ITU-T [email protected] 1 Introduction IP telephony is known as a technology that allows standard telephone voice signals to be compressed into data packets for transmission over the Internet or other IP network. The protocols used in carrying the voice signals over the IP networks are commonly referred to as Voice over IP (VoIP). The spam problem in email and instant messaging (IM) makes the email or the IM users to trust less of these tools and consequently reduce their usage. While the security mechanisms for the IP telephony are being studied, the spam problem in VoIP has not been studied extensively yet. -
A Survey on Voip Security Attacks and Their Proposed Solutions
International Journal of Application or Innovation in Engineering & Management (IJAIEM) Web Site: www.ijaiem.org Email: [email protected], [email protected] Volume 2, Issue 3, March 2013 ISSN 2319 - 4847 A Survey on VoIP Security Attacks and their Proposed Solutions Jyoti Shukla1, Bhavana Sahni2 1Assistant Professor, Amity University 2M.tech Student, Amity University ABSTRACT VoIP is a communication protocol which is being widely used and voice calls are transmitted over an IP network such as internet instead of Public Switched Telephone Networks (PSTN). VoIP converts voice into digital signal that travels over the internet and the audio output device makes the digital to audio conversation at the receiver side. In today's time people are using these technologies in their daily life, for communication over the internet but they are not aware with the security issues on VoIP conversation. There are different types of security issues with VoIP conversation. The main focus on this paper is to introduce different security attacks and defense approaches for security attacks on VoIP conversation. Keywords: VoIP, Security Attacks, Defense Approaches. 1. INTRODUCTION Voice over internet protocol (VoIP) is routing of voice conversation over the internet or IP based network. The flow of voice data over the internet in the VoIP system firstly human voice must be converted into digitized form. Then it is compressed to save bandwidth and optionally encryption can also be used to protect the conversation from sniffing. Then the voice samples are inserted into data packets to be carried out over the IP networks. Real- time Transport Protocol which defines the standardized packet format for delivering the audio or video over the internet, RTP packet have header field to hold the data and it is needed to correctly re-assemble packet into voice signal on the other end. -
Characterizing Robocalls Through Audio and Metadata Analysis
Who’s Calling? Characterizing Robocalls through Audio and Metadata Analysis Sathvik Prasad, Elijah Bouma-Sims, Athishay Kiran Mylappan, and Bradley Reaves, North Carolina State University https://www.usenix.org/conference/usenixsecurity20/presentation/prasad This paper is included in the Proceedings of the 29th USENIX Security Symposium. August 12–14, 2020 978-1-939133-17-5 Open access to the Proceedings of the 29th USENIX Security Symposium is sponsored by USENIX. Who’s Calling? Characterizing Robocalls through Audio and Metadata Analysis Sathvik Prasad Elijah Bouma-Sims North Carolina State University North Carolina State University [email protected] [email protected] Athishay Kiran Mylappan Bradley Reaves North Carolina State University North Carolina State University [email protected] [email protected] Abstract Despite the clear importance of the problem, much of what Unsolicited calls are one of the most prominent security is known about the unsolicited calling epidemic is anecdotal issues facing individuals today. Despite wide-spread anec- in nature. Despite early work on the problem [6–10], the re- dotal discussion of the problem, many important questions search community still lacks techniques that enable rigorous remain unanswered. In this paper, we present the first large- analysis of the scope of the problem and the factors that drive scale, longitudinal analysis of unsolicited calls to a honeypot it. There are several challenges that we seek to overcome. of up to 66,606 lines over 11 months. From call metadata we First, we note that most measurements to date of unsolicited characterize the long-term trends of unsolicited calls, develop volumes, trends, and motivations (e.g., sales, scams, etc.) have the first techniques to measure voicemail spam, wangiri at- been based on reports from end users. -
Watchguard Internet Security Report Q4 2020
INTERNET SECURITY REPORT Quarter 4, 2020 Contents The Firebox Feed™ provides quantifiable 03 Introduction data and trends about hackers’ latest 05 Executive Summary attacks, and understanding these trends can help us improve our defenses. 06 Firebox Feed Statistics 08 Malware Trends 09 Overall Malware Trends 11 Most-Widespread Malware 13 Catching Evasive Malware 14 Individual Malware Sample Analysis 18 Network Attack Trends 19 Most-Widespread Network Attacks 21 Top 10 Network Attacks Review 22 Overall Geographic Attack Distribution 24 DNS Analysis 25 Top Malware Domains 27 Firebox Feed: Defense Learnings 28 Endpoint Threat Trends 30 Top Ransomware Variants in 2020 33 Endpoint Defense Learnings 34 Top Security Incident 35 SolarWinds Breach 39 Important Takeaways 40 Conclusion and Defense Highlights 43 About WatchGuard Internet Security Report: Q4 2020 • 2 Introduction The Q4 report covers: As digital technology has evolved and become much more Firebox Feed Threat Trends: interconnected, your individual company’s cybersecurity This section highlights the top malware, network posture has expanded to affect others far beyond just your own 06 attacks, and threatening domains we see targeting organization. This complex cyber-ecosystem means it’s now in customers. We break these results down both by your best interest to improve everyone’s cybersecurity stance, raw volume and by the most widespread threats, not just your own. I believe cybersecurity needs to become a while also giving a regional view. We also highlight community effort that creates a tide to lift all boats. individual standout threats, such as Emotet, Tesla Agent, the return of cryptominers, and an IoT trojan Both the pandemic and the SolarWinds breaches seeded my targeting consumer routers called The Moon. -
(Public Pack)Agenda Document for Licensing Sub-Committee, 16/04
Public Document Pack LICENSING SUB-COMMITTEE MEETING TO BE HELD IN CIVIC HALL, LEEDS ON TUESDAY, 16TH APRIL, 2019 AT 10.00 AM MEMBERSHIP Councillors H Bithell - Kirkstall; C Knight - Weetwood; G Wilkinson - Wetherby; Enquiries specific to Agenda compiled by: Entertainment Licensing: Governance and Scrutiny Support Stephen Holder Civic Hall Tel No: 0113 3785332 LEEDS LS1 1UR Tel No: 0113 3788662 Produced on Recycled Paper A CONFIDENTIAL AND EXEMPT ITEMS The reason for confidentiality or exemption is stated on the agenda and on each of the reports in terms of Access to Information Procedure Rules 9.2 or 10.4(1) to (7). The number or numbers stated in the agenda and reports correspond to the reasons for exemption / confidentiality below: 9.0 Confidential information – requirement to exclude public access 9.1 The public must be excluded from meetings whenever it is likely in view of the nature of the business to be transacted or the nature of the proceedings that confidential information would be disclosed. Likewise, public access to reports, background papers, and minutes will also be excluded. 9.2 Confidential information means (a) information given to the Council by a Government Department on terms which forbid its public disclosure or (b) information the disclosure of which to the public is prohibited by or under another Act or by Court Order. Generally personal information which identifies an individual, must not be disclosed under the data protection and human rights rules. 10.0 Exempt information – discretion to exclude public access -
How to Delist a Blacklisted IP Address
How to delist a blacklisted IP address PROBLEM My IP address is blacklisted by some sender reputation RBL and emails are not delivered. How can I remove it form the blacklists? RBLs Our dedicated IP are only assigned to one account at a time, so we expect those users to take responsibility for all of the mail that is sent through their account. Please note: in the event that a sending domain (and not the IP address) is blacklisted, that domain’s controller will be responsible for handling the delisting request. RBLs are blacklists of IP addresses. One IP address enters into a blacklist for spamming activity. Here you can find instructions on what to do once the IP address entered into one or more blacklists. Why did you get into the blacklist in the first place? First of all, make sure you identified the reason for the blacklisting. If you didn’t identify and resolve it, you will just make things worse by asking for delisting. The IP will be quickly re-blacklisted and it will be harder to delist it. So, check why the IP has been blacklisted and fix the source of the problem before going ahead. Once you resolved all the problems (if it is a new IP address there is no problem to resolve, of course), you can go ahead with the delisting with the following instructions. First time cleanup If you just acquired this IP address, make sure that the dns reverse lookup is set before requesting removal from blacklists. When asked for a reason for requesting delisting, tell that you just acquired the IP address. -
Mimecast Cloud Archive
S Mimecast Cloud Archive The Best Defense is a Good Offense Effective information management is a business-critical issue for organizations of all sizes and across a wide variety of industries. As the massive volumes of data being created converge with increasingly stringent restrictions on how information must be maintained, the data management quandary is fast approaching a boiling point; and organizations are struggling to keep pace. From enforcing complex regulatory policies and reducing legal exposure to ensuring efficient data retrieval and safeguarding employee productivity, companies need solutions that can tame complexity, minimize risk, reduce costs, and decrease the burden on already over-taxed resources. Mimecast helps companies protect their employees, intellectual property, customer data, and brand reputations by providing comprehensive, cloud-based security and compliance solutions that mitigate risk and reduce the cost and complexity of creating a cyber-resilient organization. The Mimecast Cloud Archive solution is a multi-purpose platform that serves the needs of legal, compliance, and IT leaders. With capabilities for managing retention, e-discovery, compliance, and supervision, Mimecast Cloud Archive helps reduce cost, complexity, and risk, while bringing greater insights and decision-making power to the people who need it. A leader in the Gartner Magic Quadrant for Enterprise Information Archiving for four years’ running, the solution allows you to: • Ensure Compliance – Mimecast Cloud Archive removes the guess work The Archiving Imperative from compliance by automating the application of customer-defined retention policies. Customers can reduce the risk, cost, and complexity T erag Dover abyt of navigating dynamic regulatory requirements, while controlling 1,0001 audit-readiness. -
Monthly Security Bulletin
Advanced Security Operations Center Telelink Business Services www.telelink.com Monthly Security Bulletin March 2020 This security bulletin is powered by Telelink’s Advanced Security Operations Center The modern cybersecurity threat landscape is constantly evolving. Why Advanced Security New vulnerabilities and zero-day attacks are discovered every day. The Operations Center (ASOC) by old vulnerabilities still exist. The tools to exploit these vulnerabilities are Telelink? applying more complex techniques. But are getting easier to use. • Delivered as a service, which Mitigating modern cyber threats require solutions for continuous guarantees fast implementation, monitoring, correlation, and behavior analysis that are expensive and clear responsibility in the require significant amount of time to be implemented. Moreover, many Supplier and ability to cancel the organizations struggle to hire and retain the expensive security experts contract on a monthly basis. needed to operate those solutions and provide value by defending the • Built utilizing state of the art organizations. leading vendor’s solutions. • Can be sized to fit small, The ASOC by Telelink allows organizations get visibility, control, and medium and large business recommendations on improving their security posture for a fixed and needs. predictable monthly fee. • No investment in infrastructure, team, trainings or required technology. • Flexible packages and add-ons that allow pay what you need approach. • Provided at a fraction of the cost of operating your own SOC. LITE -
Best Practices for Securing the Enterprise in Today's Collaboration
Best Practices for Securing the Enterprise in Today’s Collaboration-Based World A New Multi-Sponsor Survey, eGuide and Lead-Generation Program In Collaboration with Effectus Media Group, LLC Optional Participation in a Virtual Summit Project OR-JULYESC Effectus Media Group, LLC 2901 West Coast Highway, Suite 200 Newport Beach, CA 92663 C O N F I D E N T I A L WHO SHOULD CONSIDER THIS PROGRAM? This program is intended for sponsorship by any vendor that provides solutions designed to protect collaboration applications and data stores from advanced threats like phishing, ransomware and CEO Fraud/Business Email Compromise/whaling (BEC). Even smaller organizations can use in excess of 100 collaboration applications, including Microsoft Office 365, Microsoft Teams, Slack, Skype, Box, Google Apps, GotoMeeting, and Docusign, as well as a host of apps for individual departments. The intended audience for the eGuide will be decision makers and influencers in mid- sized and large organizations who are charged with evaluating and selecting security solutions. The goal of this program will be to help decision makers and influencers understand the risks of a growing number of collaboration applications, the growing volume of data that they contain, and the growing number and sophistication of advanced threats that can put corporate data at risk. In short, within this threat landscape, what are the best practices enterprises can employ and how can IT organizations regain control of their environments? OVERVIEW Vertical and horizontal collaboration applications with enterprises are now growing by leaps and WHAT THIS PROGRAM bounds. These applications go well beyond just INCLUDES: social networks, but include unified communications, document and workflow A mini-survey of management, and mobile and remote device corporate decision makers connectivity that can serve all employees. -
Hot Topics and Trends in California Consumer Class Actions
Hot Topics and Trends in California Consumer Class Actions Presented by: Robert B. Milligan, Daniel Joshua Salinas & Darren W. Dummit April 15, 2021 Seyfarth Shaw LLP “Seyfarth” refers to Seyfarth Shaw LLP (an Illinois limited liability partnership). ©2021 Seyfarth Shaw LLP. All rights reserved. Private and Confidential Legal Disclaimer This presentation has been prepared by Seyfarth Shaw LLP for informational purposes only. The material discussed during this webinar should not be construed as legal advice or a legal opinion on any specific facts or circumstances. The content is intended for general information purposes only, and you are urged to consult a lawyer concerning your own situation and any specific legal questions you may have. Seyfarth Shaw LLP “Seyfarth” refers to Seyfarth Shaw LLP (an Illinois limited liability partnership). ©2020 Seyfarth Shaw LLP. All rights reserved. Private and Confidential Agenda 01 COVID-19 Consumer Class Action Developments 02 Latest TCPA Decisions and Trends 03 Eavesdropper and Call Recording Claims Under CIPA 04 Recent Developments in Privacy/Data Breach 05 False Advertising Claims 06 Latest Developments Concerning Arbitration and Class Waivers Latest Decisions and Trends Involving Live Sports, Entertainment, 07 and Recreation ©2021 Seyfarth Shaw LLP. All rights reserved. Private and Confidential 3 Speakers Robert Milligan Daniel Joshua Salinas Darren W. Dummit Litigation Trade Secrets, Computer Litigation LOS ANGELES/ Fraud & Non-Competes LOS ANGELES/ CENTURY CITY LOS ANGELES/ CENTURY CITY CENTURY