Securely connecting to a VPN server requires the use of public-key encryption through a TLS handshake. They then use this private key to decrypt the messages.įully managed, cloud-based firewall providing continuous inspection and treatment of internet traffic. The public key is used to encrypt data, which is then sent to the owner of the private key. Here, software is used to create sets of public and private keys. This is the type of encryption used in VPN services. This is where the key for encryption and decryption is the same, and both communicating parties must possess the same key in order to communicate. There are a few key concepts in the world of encryption: Symmetric-key This cannot be brute-forced as it would take billions of years to run through all the possible bit combinations. Generally speaking, a short key length means poor security as it is more susceptible to violation by brute-force attacks.Ī key length of 256 bits is the current ‘gold standard’. For example, Blowfish-128 is the Blowfish cipher with a key length of 128 bits. When talking about encryption today, we generally refer to a mixture of cipher and key-length, which denotes the number of ‘bits’ in a given key. The operation of a cipher usually depends on a piece of auxiliary information called a key without knowledge of the key, it is extremely difficult – if not impossible – to decrypt the resulting data. These ciphers simply denote a series of well-defined steps that can be followed repeatedly. We now use powerful algorithms called ciphers to perform encryption and decryption. Types of VPN encryptionĪt a very basic level, encryption involves substituting letters and numbers to encode data so that only authorized groups can access and understand it. In explaining the confusing array of terms commonly used by VPNs and other security products, you will be in a stronger position to choose the most secure protocol and assess the claims made by VPN providers with a much more critical eye. We’ll review different types of encryption, the main VPN protocols available, and the common ciphers behind them. This article will provide a simple point of reference for those who want to explore the technologies driving their VPN service. This confusion is reinforced by the fact that many VPN providers can be slapdash to the point of misleading when describing the type of encryption that they use. Though many of us are aware of how a VPN generally works, it’s common to get lost on the fine details of the technology due to the sheer complexity of the subject. Each one represents a different solution to the problem of secure, private, and somewhat anonymous browsing. Depending on the protocol in use, a VPN might have different speeds, capabilities, or even vulnerabilities.Įncryption protocols and ciphers are at the heart of VPN technology, determining how your ‘secure tunnel’ is actually formed. Most large organizations still employ a VPN solution to facilitate secure remote access, while millions of consumers rely on similar products to bolster their online privacy, secure public Wi-Fi connections, and circumvent site blocks.īy now, most of us know that a VPN assigns us a new IP address and transmits our online traffic through an encrypted tunnel. Introduced to the market nearly two decades ago, Virtual Private Networks (VPNs) are a uniquely enduring cornerstone of modern security.
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