But the further down the transmission line the data goes, the smaller the effort for encryption per bit becomes. Next could be a switch, where data from several routers is collected and sent through a network (e.g., fiber).Īgain, end-to-end encryption is the most secure since there is no chance to intercept the actual message or data along the line. Ideally, it would be done between the end points, which are usually within the application on the computer where data is generated-for example, between a web browser and the web server, or at the router connecting the computer with the local area network. It starts with the question, where and how it is executed? Encryption can be applied on different points of the data transmission.

So, how do you protect valuable data in a post-quantum era? Where encryption is executedįor a better understanding of quantum-safe cryptography, we will first introduce some basics of encryption. Now, quantum technology promises a new generation of computers with unprecedented capabilities, which threatens many encryption methods currently used. Since the days of Alan Turing, computers have been used to decipher codes, and ever since encryption strength evolved with computing power. The technology that safeguards all these data transactions is encryption-the more precious the data, the stronger the encryption. Even when using an instant messaging service on a smartphone, the expectation is that it cannot easily be intercepted.

The same holds for a hospital sending medical records to another institution, and for governmental agencies transferring secret or classified information. When you transfer money with your smartphone, you assume to do a safe operation.

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