EPS Confidentiality and Integrity mechanisms Algorithmic Approach
The Long Term Evolution of UMTS is one of the latest steps in
an advancing series of mobile telecommunications systems.
Many articles have already been published on the LTE subject
but these publications have viewed the subject from particular
perspectives. In the present paper, a different approach has been
taken. We are interested in the security features and the
cryptographic algorithms used to ensure confidentiality and
integrity of the transmitted data. A closer look is taken to the two
EPS confidentiality and integrity algorithms based on the block
cipher algorithm AES: the confidentiality algorithm EEA2 and
the integrity algorithm EIA2. Furthermore, we focused on the
implementation of both algorithms in C language in respect to
the specifications requirements. We have tested our
implementations according to the testsets given by the 3rd
Generation Partnership Project (3GPP) implementation
document. Some examples of the implementation tests are
presented bellow.
Keywords: LTE, Confidentiality, Integrity, AES, EEA, EIA,
Implementation
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