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The BB84 Protocol
 
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A short video attempting to explain the Bennett & Brassard quantum cryptography protocol. I've omitted any mention of the particular details of quantum physics that would be involved in actual real-world implementations, such as particle polarization axes, spin, and so forth, instead replacing them with abstract "processes" and freakish mysterious "machines". The physical details (interesting though they are) are not needed to understand the basics of the protocol, and I'm no physicist, so I'd probably mess them up if I tried (assuming I haven't already!). Making these images has increased my affection for Microsoft PowerPoint, and putting them all into a video has hugely exacerbated my hatred for Windows Movie Maker. NOTE: An important missing piece of information: When Alice sends qubits to Bob, she chooses between process A and process B randomly for each qubit. NOTE 2: The following video explains BB84 as well, and gives more detail regarding the physics details: http://www.youtube.com/watch?v=7SMcf1MdOaQ NOTE 3: Here is another very interesting video about quantum cryptography. Any given real-world implementation, despite using the BB84 protocol, is bound to expose weaknesses that can be exploited. For example: http://www.youtube.com/watch?v=T0WnUlF2eAo
Views: 43726 Creature Mann
Will Quantum Computers break encryption?
 
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How do you secure messages over the internet? How do quantum computers break it? How do you fix it? Why don't you watch the video to find out? Why does this description have so many questions? Why are you still reading? What is the meaning of life? Facebook: https://www.facebook.com/frameofessence Twitter: https://twitter.com/frameofessence YouTube: https://www.youtube.com/user/frameofessence CLARIFICATIONS: You don't actually need a quantum computer to do quantum-safe encryption. As briefly mentioned at 7:04 , there are encryption schemes that can be run on regular computers that can't be broken by quantum computers. CORRECTIONS: [2:18] Technically, you can use any key to encrypt or decrypt whatever you want. But there's a specific way to use them that's useful, which is what's shown in the video. [5:36] In RSA, depending on exactly what you mean by "private key", neither key is actually derivable from the other. When they are created, they are generated together from a common base (not just the public key from the private key). But typically, the file that stores the "private key" actually contains a bit more information than just the private key. For example, in PKCS #1 RSA private key format ( https://tools.ietf.org/html/rfc3447#appendix-A.1.2 ), the file technically contains the entire public key too. So in short, you technically can't get the public key from the private key or vice versa, but the file that contains the private key can hold more than just the private key alone, making it possible to retrieve the public key from it. Video links: Encryption and HUGE numbers - Numberphile https://youtu.be/M7kEpw1tn50 The No Cloning Theorem - minutephysics https://youtu.be/owPC60Ue0BE Quantum Entanglement & Spooky Action at a Distance - Veritasium https://youtu.be/ZuvK-od647c Sources: Quantum Computing for Computer Scientists http://books.google.ca/books/about/Quantum_Computing_for_Computer_Scientist.html?id=eTT0FsHA5DAC Random person talking about Quantum MITM attacks http://crypto.stackexchange.com/questions/2719/is-quantum-key-distribution-safe-against-mitm-attacks-too The Ekert Protocol (i.e. E91) http://www.ux1.eiu.edu/~nilic/Nina's-article.pdf Annealing vs. Universal Quantum Computers https://medium.com/quantum-bits/what-s-the-difference-between-quantum-annealing-and-universal-gate-quantum-computers-c5e5099175a1 Images, Documents, and Screenshots: Post-Quantum Cryptography initiatives http://csrc.nist.gov/groups/ST/post-quantum-crypto/cfp-announce-dec2016.html http://pqcrypto.eu.org/docs/initial-recommendations.pdf Internet map (Carna Botnet) http://census2012.sourceforge.net/ Quantum network maps https://www.slideshare.net/ADVAOpticalNetworking/how-to-quantumsecure-optical-networks http://www.secoqc.net/html/press/pressmedia.html IBM Quantum http://research.ibm.com/ibm-q/ Music: YouTube audio library: Blue Skies Incompetech: Jay Jay Pamgaea The House of Leaves Premium Beat: Cutting Edge Technology Second Time Around Swoosh 1 sound effect came from here: http://soundbible.com/682-Swoosh-1.html ...and is under this license: https://creativecommons.org/licenses/sampling+/1.0/
Views: 524313 Frame of Essence
How Does Quantum Key Distribution Work?
 
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Rectilinear (vertical and horizontal) diagonal (at 45 it seems that the initial diagram is correct. Sep 2014 'this licensing agreement with whitewood encryption systems, inc. But before getting to how it can be compromised, michael kassner calls on some experts explain quantum key distribution works 26 oct 2015 does not refer merely the limitations of a particular measurement technology holds for all possible measurements. Quantum key distribution works gcn. Quantum key distribution (qkd) is a secure communication method which implements cryptographic protocol involving components of quantum mechanics. Ntt can quantum key distribution improve smartphone and tablet security? . The photons are coded in binary ones and zeroes which then picked up by the receiving equipment. Aspx "imx0m" url? Q webcache. Even better security is delivered with a mathematically unbreakable form of encryption called one time pad, whereby data encrypted using truly random key the same eavesdropper does not send replacement state to bob replace what alice had transmitted, discrepancy present in shared will be such that groups helps students grasp basic concepts are necessary understand how quantum distribution works and why particular protocol secure or 9 aug 2017 (qkd) family protocols for growing private between two partiessince original keys independent secret strings, their bit wise parity just uniformly string, so announcement reveal any useful information potential 8 nov 2016 promises unconditional communication currently being deployed commercial applications. Implementation security of quantum key distribution. This ultimate security is an attractive feature, and companies organizations in several countries, including japan, are working on the deployment of networks for quantum key distribution application expert michael cobb explains how works, whether it a viable method improving smartphones tabletsrelated q&a. Is historic in that it takes our groundbreaking technical work was developed over if implemented on a wide scale, quantum key distribution technology could ensure truly secure commerce, banking, communications and data transfer 1 may 2012 cryptography is not infallible. Quantum key distribution is the ultimate cryptography in that it theoretically secure against any possible eavesdropping. It enables two parties to produce a shared random secret key known only them, which can then be used encrypt and decrypt messages 1 dec 2016 quantum distribution protocols that are commonly mentioned mostly in use today's implementations bb84 protocol sarg. These photons are encoded into quantum states 15 jan 2010. The key itself is the most secure and widely used methods to protect confidentiality integrity of data transmission are based on symmetric cryptography. Npj quantum the next stage in key distribution computer weeklypopular sciencewhat is (qkd)? Definition from techopedia. Quantum cryptography is integrated into an optical communication system by adding a qua
Views: 41 tell sparky
What is SIX-STATE PROTOCOL? What does SIX-STATE PROTOCOL mean? SIX-STATE PROTOCOL meaning
 
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What is SIX-STATE PROTOCOL? What does SIX-STATE PROTOCOL mean? SIX-STATE PROTOCOL meaning - SIX-STATE PROTOCOL definition - SIX-STATE PROTOCOL explanation. Source: Wikipedia.org article, adapted under https://creativecommons.org/licenses/by-sa/3.0/ license. SUBSCRIBE to our Google Earth flights channel - https://www.youtube.com/channel/UC6UuCPh7GrXznZi0Hz2YQnQ Six-State Protocol (SSP) is the quantum cryptography protocol that is the version of BB84 that uses a six-state polarization scheme on three orthogonal bases. Six-state protocol was introduced by Pasquinucci and Gisin in 1999 in their article "Incoherent and coherent eavesdropping in the six-state protocol of quantum cryptography." "The six-state protocol is a discrete-variable protocol for quantum key distribution that permits tolerating a noisier channel than the BB84 protocol." (2011, Abruzzo). SSP produces a higher rate of errors during attempted eavesdropping, thus making it easier to detect errors, as an eavesdropper must choose the right basis from three possible bases (Haitjema, 2016). Higher dimensional systems such as this have been proven to provide a higher level of security (Bruß & Macchiavello, 2002).
Views: 29 The Audiopedia
protocolo e91 (en proceso) - Copy - by Wideo.co
 
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Views: 191 MrEspartanox
Quantum entanglement
 
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Quantum entanglement is a physical phenomenon that occurs when pairs or groups of particles are generated or interact in ways such that the quantum state of each particle cannot be described independently – instead, a quantum state may be given for the system as a whole. Measurements of physical properties such as position, momentum, spin, polarization, etc. performed on entangled particles are found to be appropriately correlated. For example, if a pair of particles is generated in such a way that their total spin is known to be zero, and one particle is found to have clockwise spin on a certain axis, then the spin of the other particle, measured on the same axis, will be found to be counterclockwise. Because of the nature of quantum measurement, however, this behavior gives rise to effects that can appear paradoxical: any measurement of a property of a particle can be seen as acting on that particle (e.g. by collapsing a number of superimposed states); and in the case of entangled particles, such action must be on the entangled system as a whole. It thus appears that one particle of an entangled pair "knows" what measurement has been performed on the other, and with what outcome, even though there is no known means for such information to be communicated between the particles, which at the time of measurement may be separated by arbitrarily large distances. This video is targeted to blind users. Attribution: Article text available under CC-BY-SA Creative Commons image source in video
Views: 771 Audiopedia

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