Bijection

A bijection f is a function which is both an injection and a surjection. For each bijection f:X→Y we can define its inverse f-1Y→X where f-1(y)=x if f(y)=x.

Example

The function f(x)=x is a bijection.

References

A. Menzes, P. van Oorschot, and S. Vanstone, Handbook of Applied Cryptography. CRC Press, 1996.