Research Article

A Lattice-Based Authentication Scheme for Roaming Service in Ubiquitous Networks with Anonymity

Table 1

Notations and definition.

NotationDefinition

nDimensions of polynomial rings in NTRU
pA small positive prime integer, usually 2 or 3
qA positive integer used to reduce the coefficients of polynomial
One-way hash function
The true identity of communication entity
SIDThe anonymous identity of MU
IMThe identification of MU
Set of polynomials f over
Set of polynomials over
Set of polynomials z over
Inverse of polynomial
Inverse of polynomial
The public key of communication entity
The polynomial over
The polynomial over
The random polynomial chosen from
The session key of communication entity and