Quantum information technology for secure communication plus (QITSeCOM +)

随着互联网在我们日常生活中的重要性日益增加，我们如何防止恶意窃听者的篡改？我们能确保没有人能窃取我们的电子银行密码吗？或者了解我们的业务战略？如果我们所有的在线通信都不安全，我们该怎么办？目前的通信安全是基于数学假设。这种方法的问题是，我们不知道这些假设是否正确。量子密码学采取了另一种方法。量子密码学建立在基本的量子物理定律的基础上。量子密码学依赖于当人们试图获得有关这些性质的信息时，不可避免地修改单个轻粒子的属性。因此，如果我们首先将密钥发送给我们的银行或业务伙伴，并将该密钥编码为轻粒子，我们可以发现是否有人试图窃听。因此，我们还可以知道是否没有人篡改密钥。既然我们现在有了密钥，我们就可以用它来以一种可证明的安全方式锁定我们的信息，只有我们的合作伙伴才能解锁它。量子密码学最早是在20世纪80年代的S提出的，第一批商业系统现在已经有几年了。然而，它仍然存在密钥分发速率低的问题，需要更好地集成到现有的通信架构中，目前传输距离仅限于100公里左右。QITSeCom+建立在泰特尔博士将量子密码学和通信从实验室带入真正电信网络方面的丰富经验基础上。它旨在对量子中继器的关键元素进行基础研究，包括量子隐形传态和量子存储器，这是挑战距离障碍所必需的。

With the increasing importance of the Internet in our daily lives, how do we protect against tampering by a malevolent eavesdropper? Can we be sure that nobody can steal our password required for e-banking? Or learn about our business strategy?  What do we do if all of our on-line communication is not secure?Current communication security is based on mathematical assumptions. The problem with this approach is that we do not know if these assumptions are correct. Quantum Cryptography takes another approach. It bases security on fundamental, quantum physical laws.Quantum Cryptography relies on the inevitable modification of the properties of individual light particles when someone tries to gain information about these properties. Hence, if we first send a key to our bank or business partner, and we encode this key into light particles, we can find out if somebody tried to listen in. Therefore, we can also know if nobody tampered with the key. Since we now have a secret key, we can use it to lock our information in a provable secure way, and only our partner can unlock it.Quantum Cryptography was first proposed in the 1980's, and the first commercial systems have now been available for a few years. Yet, it still suffers from low key distribution rates, requires better integration into existing communication architecture, and is currently limited to transmission distances of around 100 km.QITSeCom + builds on Dr Tittel's extensive experience in bringing quantum cryptography and communication out of the laboratory into a real telecommunications network. It aims to conduct basic research into key elements of a quantum repeater, including quantum teleportation and quantum memory, which is required to challenge the distance barrier.