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[Fizinfo] Máté Galambos on Position Based Cryptography and Teleportation Attacks

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  • From: Andras Palyi <palyi.andras AT>
  • To: FIZINFO AT, kvantuminfo AT
  • Subject: [Fizinfo] Máté Galambos on Position Based Cryptography and Teleportation Attacks
  • Date: Tue, 12 Oct 2021 16:56:00 +0200
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Dear Colleagues,

On Thursday we host the following talk:

Máté Galambos (BME VIK)
Position Based Cryptography and Teleportation Attacks

online in Teams
2021 Oct 14, 11:15
Abstract: see below

Teams link:

Best regards,
Andras Palyi
BME Institute of Physics, Department of Theoretical Physics

= = =

Quantum Key Distribution (QKD) is currently the leading application of
quantum communication. However the question remains: can we use quantum
communication for some other purpose in the future? One proposal beyond QKD
is Position Verification, where multiple trusted parties (so called
verifiers) check whether a distant, willing communication partner (so called
prover) is telling the truth about his geographical position. Position
Verification however does not have the unconditional security QKD has. We now
know that with enough quantum resources any Position Verification scheme can
be attacked using an elaborate teleportation process. Yet the best currently
known universal attack is prohibitively resource intensive. This means,
Position Verification current has practical security much like RSA
encryption. In my talk, I will present the current state of research in this
field. I will introduce a general algorithm of Position Verification, and why
it requires quantum communication. I will talk about a teleportation method
discovered in the last ten years (called Port Based Teleportation), why it is
a unique computational tool, and how could it be used to attack Position
Verification. Finally–if time permits–I will talk about my own work: if
Position Verification is secure under some assumptions, how could we use it
to track the position of valuable data (such as a diplomatic package or
nuclear launch codes). This research was supported by the Ministry of
Innovation and Technology and the National Research, Development and
Innovation Office within the Quantum Information National Laboratory of

  • [Fizinfo] Máté Galambos on Position Based Cryptography and Teleportation Attacks, Andras Palyi, 10/12/2021

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