Guest column: The impact of quantum computers on cryptography

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To explain the impact of quantum computers, it is best to first take a step back to review how current encryption technologies work.

There are two broad flavours of encryption technology: symmetric key cryptography and asymmetric key cryptography. Symmetric key cryptography is the older and more familiar flavour. In this case, both parties who wish to communicate secretly with one another must first share a common secret key. ...

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