We use a chain of multiple certificates to verify the public key of an end entity. A certificate chain is an ordered list of certificates that enables a client to verify the end entity’s public key. How does the verification of digital certificates work? In this...
SFTP or SSH File Transfer Protocol is a network protocol that provides file transfer functionality over a secure and reliable data stream. This protocol was designed by Internet Engineering Task Force or IETF and it can be used with SSH version 2.0. The protocol...
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...
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 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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