Quantum Encryption - A Means to Perfect Security?

ثبت نشده
چکیده

In the past twenty years, the quantum properties of matter and light have been applied to the field of information security. Research has advanced to the point that actual devices using quantum properties are transmitting information over considerable distances. At this time, transmission speeds and hardware expense have generally limited the use of quantum devices to distribute keys rather than entire messages. There is controversy about how secure quantum messages are. It is possible to prove that the probability of ...

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Limitations on information theoretically secure quantum homomorphic encryption

Homomorphic encryption is a form of encryption which allows computation to be carried out on the encrypted data without the need for decryption. The success of quantum approaches to related tasks in a delegated computation setting has raised the question of whether quantum mechanics may be used to achieve information theoretically secure fully homomorphic encryption. Here we show, via an inform...

متن کامل

Generalized Quantum Shannon Impossibility for Quantum Encryption

The famous Shannon impossibility result says that any encryption scheme with perfect secrecy requires a secret key at least as long as the message. In this paper we prove its quantum analogue with imperfect secrecy and imperfect correctness. We also provide a systematic study of information-theoretically secure quantum encryption with two secrecy definitions.

متن کامل

On quantum homomorphic encryption with passive third party

Quantum homomorphic encryption is a form of encryption in which two parties named Alice and Bob have the input data and program, respectively, and Bob computes the program on the encrypted input data and returns the result to Alice, without knowing Alice’s input data. We have recently shown that any quantum homomorphic encryption with perfect data privacy cannot keep the program private at all,...

متن کامل

Quantum Key Recycling with eight-state encoding

Perfect encryption of quantum states using the Quantum One-Time Pad (QOTP) requires 2 classical key bits per qubit. Almost-perfect encryption, with information-theoretic security, requires only slightly more than 1. We slightly improve lower bounds on the key length. We show that key length n+2 log 1 ε suffices to encrypt n qubits in such a way that the cipherstate’s L1-distance from uniformity...

متن کامل

Quantum Search on Encrypted Data Based on Quantum Homomorphic Encryption

Here we propose a quantum search protocols on ciphered superposition state based on quantum homomorphic encryption where a client Alice with limited quantum ability can deliver her encrypted quantum data to a powerful but untrusted quantum search server and let the server search for her without decryption. By outsourcing the key-updating and interaction work to a trusted key center, the client ...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2017