In abstract algebra, a finite field or Galois field (so named in honor of Evariste Galois) is a field that contains only finitely many elements. Finite fields are important in cryptography and coding theory.

• 只有有限个元素的域称为有限域，或Galois域，它在方程式实验设计和编码理论等方面有很广泛的应用。