Cloud telephony has gained popularity in companies due to its flexibility, scalability and reduced costs. However, like any internet-based technology, it faces specific security challenges that need to be carefully managed to ensure the protection of data and communications. Among the main risks are fraud, call interception, attacks such as DoS (Denial of Service) and voice phishing, also known as number cloning. In this post, we will explore these challenges and how to mitigate them.
- Cloud telephony fraud
Fraud is one of the biggest risks faced by companies that use cloud telephony. It can occur when criminals gain access to the system and use corporate numbers to make fraudulent international calls or exploit other paid services. This type of attack can result in significant financial losses.
How can it be avoided?
Fraud prevention starts with using strong authentication, such as multi-factor authentication (MFA), to ensure that only authorized users can access phone systems. Additionally, implementing call limits and real-time alerts about unusual activity can help identify and block fraud quickly.
- Call interception
Call interception is another significant risk. In man-in-the-middle attacks, hackers can capture call traffic, listening in on private conversations and collecting confidential information. This poses a particularly serious risk for companies that handle sensitive data, such as financial institutions or healthcare companies.
How to avoid it?
One of the main ways to protect against call interception is to ensure that communications are encrypted end-to-end. Using security protocols such as Transport Layer Security (TLS) for VoIP calls helps protect data in transit. It is also important to ensure that end-user devices are secure, with regular updates and appropriate security settings.
- DoS (Denial of Service) attacks
DoS and DDoS (Distributed Denial of Service) attacks are another significant concern in cloud telephony. These attacks seek to overload telephony servers with excessive traffic, making services inaccessible to legitimate users. In the case of cloud telephony, a DoS attack can completely disrupt a company’s communications, jeopardizing business continuity.
How to avoid it?
Protecting yourself from DoS and DDoS attacks involves implementing multi-layered defense measures. This can include the use of advanced firewalls, intrusion detection systems, and protection against anomalous data traffic. It is also important to work with cloud telephony providers that offer robust infrastructure and the ability to mitigate large-scale attacks.
- Voice phishing (number cloning)
Voice phishing, or “vishing,” is a form of attack where the criminal uses social engineering and number cloning techniques to trick users into obtaining sensitive information. In the case of number cloning, the criminal pretends to be a legitimate company representative or other trusted contact in order to manipulate the victim and gain access to sensitive information.
How to avoid it?
Preventing voice phishing starts with user awareness. Regular training on how to identify fraudulent calls and security practices, such as verifying identity before sharing information, are essential. Additionally, strong authentication solutions, such as systems that require more than just the phone number, can help reduce the risk of cloning.
Conclusion
While cloud telephony offers undeniable advantages for businesses, such as increased mobility and cost reduction, it also brings security challenges that cannot be ignored. Fraud, call interception, DoS attacks and voice phishing are threats that require attention and specific actions to mitigate. Implementing robust security measures, such as encryption, multi-factor authentication, real-time monitoring and user training, is essential to ensure that company communications remain secure and protected against these risks.
