Only if the languages coincide, useful bits are conveyed. Also the receiver switches between listening in one language or the other. In our method, the sender uses two languages and randomly switches between them. If a Dutch speaker picks the Chinese room, he does not understand anything, although for a Chinese speaker the lectures are crystal clear. In one room the conference language is Chinese and in the other Dutch, but you do not know before entering. Pepijn Pinkse, who led the experiment, explains: "It is like trying to guess what is spoken in two conference rooms. Speaking Dutch in a Chinese conference room To make it hard for an attacker to see what was sent, they randomly switch the encoding between two different alphabets. They achieved this by encoding the quantum information in 10 24 possible locations of the used photons. This increases the resistance against noise and potentially increases the data rate. Researchers from the UT now increased this number with more than a thousand letters. In a sense, the photons are encoded in an alphabet of just two letters: a and b. This limits the transmission to one bit per photon. Standard QKD systems use single particles of light-photons-that are in one of two possible states, for instance horizontally or vertically polarized. Commercial QKD systems are available from several vendors and space-based versions are already deployed. With Quantum Key Distribution (QKD) one can securely build up secret keys between a sender and a receiver. Luckily, quantum technology also offers solutions. Nevertheless, we can no longer exclude the possibility that quantum computers will become so powerful that they break existing cryptography since there are known quantum algorithms that break today's most used cryptographic methods. Recently, Google claimed in Nature an experimental proof of this "quantum supremacy," although with a calculation that has no practical use. But until recently, the demonstration that a quantum computer can do anything at all that a fast classical computer cannot do was outstanding. A quantum computer could, in theory, break existing cryptography. For example, the communication between your phone and your bank to transfer some funds has to be secure to prevent criminals from altering the message and telling the bank to transfer money to a different bank account. PS.- My guess is that I could create another uid but without a comment, and it should work.Computers use cryptography to secure their communication. I'm not sure if this is a bug from git, or it is the expected result and I'm missing something :). If I remove everything from gitconfig, and try to do it only with -S, I get the same error, which makes me think that git is passing my user name and email to gpg, and the uid includes the "comment" (Personal), so it doesn't found any: $ gpg -list-keys "Pablo Olmos de Aguilera Corradini " I get: gpg: skipped "Pablo Olmos de Aguilera Corradini ": No secret keyĪs you can see the keys actually exists (they also appears when running gpg -list-secret-keys). Uid Pablo Olmos de Aguilera Corradini (Personal) Īnd putting the info on gitconfig:
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