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The Scientific World Journal
/
2014
/
Article
/
Alg 1
Research Article
Security Analysis and Improvement of an Anonymous Authentication Scheme for Roaming Services
Algorithm 1
Login and key agreement phase of He et al.’s scheme [
12
].
inputs
and
retrieves the timestamp
checks the freshness of
retrieves the timestamp
checks the freshness of
Does
yield
and
?
Does
yield
?
Does
yield
?
retrieves the timestamp
checks the freshness of
checks the freshness of
Does
yield
,
and
?