Three types of standard public-key cryptographic systems that can be considered secure, efficient, and commercially practical are (i) Integer Factorization Systems (e.g. RSA) (ii) Discrete Logarithm Systems (e.g. DSA) (iii) Elliptic Curve Cryptosystems (ECC). The security of these systems is based on the relative complexity of the underlying mathematical problem. Of all these systems, for a given key size, ECC is the most secure public key cryptosystem
A survey of various protocols based on ECC has been done in the paper. The protocols have been classified according to their use in various cryptographic security mechanisms i.e. key agreement protocols, digital signature and encipherment. A comparison of ECC with conventional public key systems reveals that ECC is best suited for applications such as mobile computing, wireless sensor networks and other devices with constrained resources.
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