In nowadays technologies, circuits are more and more sensitive to aging phenomenon, as well as soft errors. Furthermore several attacks that used a fault to derive secret information have been demonstrated on cryptosystems. Concurrent fault detection is thus of prime interest for such systems. The purpose of this paper is to compare several code-based concurrent fault detection schemes dedicated to the hardware implementation of the Advanced Encryption Standard. The protection schemes under comparison are either directly issued from the literature, or built from several complementary solutions for protection of the full implementation. The evaluation of these schemes is performed in terms of costs with particular emphasis on fault injection vs errors detection capabilities.