The Larsson-Cederlöf Bunch

by

Here’s the story
Of a quantum code
That was happy as a little code could be
Because all of its parts were so secure
At least they seemed to be.

Here’s the story
Of a man named Larsson*
Who was thinking a vulnerability could be shown
In collaboration with a former grad student**
But the results weren’t known

Till that one day when those math guys cracked that code
And they knew that it was much more than a hunch
That this code could be broken by a hacker
Who gave a one-two punch.***

A one-two punch
A one-two punch
And that code’s security is now questioned a bunch.****

_________________________________________

*Jan-Åke Larsson, a math prof at Linköping University in Sweden
**Jörgen Cederlöf, who now works for Google
***by “simultaneously manipulating both the quantum-mechanical and the regular communication needed in quantum cryptography” according to Science Daily
****Or maybe just a little – according to IEEE, Larsson and Cederlöf have provided a patch

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