New encoding schemes for quantum authentication
P. Garcia-Fernandez, Enrique Fernandez-Martinez, E.M Pérez, David J. Santos · Quantum Information and Computation · 2005
We study the potential of general quantum operations, Trace-Preserving Completely-Positive Maps (TPCPs), as encoding and decoding mechanisms in quantum authentication protocols. The study shows that these general operations do not offer significant advantage over unitary encodings. We also propose a practical authentication protocol based on the use of two successive unitary encodings.