Quantum Secure Direct Communication with Authentication Expansion Using Single Photons

【摘要】 <正> In this paper we propose two quantum secure direct communication (QSDC) protocols with authentication.The authentication key expansion method is introduced to improve the life of the keys with security.In the first scheme,the third party, called Trent is introduced to authenticate the users that participate in the communication.He sends thepolarized photons in blocks to authenticate communication parties Alice and Bob using the authentication keys.In thecommunication process, polarized single photons are used to serve as the carriers, which transmit the secret messagesdirectly.The second QSDC process with authentication between two parties is also discussed.更多还原

【Abstract】 In this paper we propose two quantum secure direct communication (QSDC) protocols with authentication. The authentication key expansion method is introduced to improve the life of the keys with security.In the first scheme, the third party, called Trent is introduced to authenticate the users that participate in the communication.He sends the polarized photons in blocks to authenticate communication parties Alice and Bob using the authentication keys.In the communication process, polarized single photons are used to serve as the carriers, which transmit the secret messages directly.The second QSDC process with authentication between two parties is also discussed.更多还原