What is the Internet Key Exchange Protocol (IKE)? IKE or Internet Key Exchange protocol is a protocol that performs mutual authentication and sets up or maintains Security Associations (SAs) in the IPSec protocol. It uses the Diffie-Hellman Key Exchange protocol to...
What is a DNS sinkhole? Let’s say an employee of a company has received one phishing email. He could not recognize the phishing attempt and clicked on the phishing link or opened an attachment to the email. As a result, the employee’s system tries to connect to the...
Many of us know that in TLS when we want to transfer some sensitive data, we do not encrypt it using public-key encryption. Instead, we use a symmetric key to encrypt the data. But why do we do so? If a TLS client encrypts the actual data, for example, by using the...
What is Domain Shadowing? When attackers use a server for spreading malware, the IP of the server often gets blacklisted. And that creates lots of inconveniences for the attackers. To circumvent that, attackers use techniques like domain shadowing. In domain...
What is a Site-to-Site VPN? Site-to-Site VPN is a type of VPN that can connect two entire networks to each other. Using this VPN, two branch offices of a company that are located in two different geographical regions can share the same virtual network. If any client...
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