Re: Quantum Cryptography can not work

If we also believe in some asymmetrical primitive (e.g., Diffie-Hellman)
Quantum cryptographers doesnt believe in DH security because
its security is computational and not unconditional.
The fact is the security hypotheses in QC are different. In QC, we
assume the attacker Eve is limited only by the laws of physics and not
by the technology. Thus Eve in QC can have unlimited power and all the
technology of the future available (e.g., quantum computers).

If I'm correctly informed, early QC systems used hypothesis that
have been proved wrong soon after, making the original system unsafe,
thus that notion of trust in physics laws is not just rethoric.

Which hypotheses? The first (and most famous) 1984 Quantum Cryptography
paper suggested a protocol (BB84) that is still the one
used among commercial QC systems. What is true
is using imperfect devices (e.g., faint laser source instead
of single-photon source) gives more strength to the
attacker and hardens the work of writing security proofs.
Another thing is QC by its nature is more subject to side
channel attacks and so constructors have to be very careful
when designing QC systems.

ouah


.

Relevant Pages

  • RE: [Full-Disclosure] Insecurity in Finnish parlament (computers)
    ... > It is unlikely that all the computers have the same security ... > (both in TeliaSonera and in our parlament). ... Red herring. ...
    (Full-Disclosure)
  • Re: Basic Security Help
    ... a network is weak or no passwords followed by malicious user on your ... -- Use password policy to enforce strong passwords in the domain by enabling ... -- Be sure that computers are kept current of critical security updates from ... Windows Updates or using a SUS server to authorize and distribute security ...
    (microsoft.public.security)
  • RE: Why Easy To Use Software Is Putting You At Risk
    ... Can Easy To Use Software Also Be Secure ... Anyone who has been working with computers for a long time will have noticed ... because DNS does not configure properly or security permissions are relaxed ... guarantee that no one really knows for sure, not even Microsoft developers. ...
    (Security-Basics)
  • Re: Is complete home security possible?
    ... > If you are a gamer, some computer games will only run in administrator ... I have a clean disk image made from Norton Ghost, ... security issues to deal with to do it monthly, ... I have been using computers since 76, never had a virus on any of my ...
    (comp.security.firewalls)
  • Re: Basic Security Help
    ... > a network is weak or no passwords followed by malicious user on your ... Be sure to educate users of any pending changes to password policy ... > Windows Updates or using a SUS server to authorize and distribute security ... > network including how to isolate and repair infected computers. ...
    (microsoft.public.security)