Finite Fields In Cryptography And Network Security

Finite fields in cryptography.
Finite fields in cryptography and network security. Groups rings fields modular arithmetic euclid s algorithm finite fields polynomial arithmetic prime numbers fermat s and euler s theorem. Finite fields are important in several areas of cryptography. Services mechanisms and attacks the osi security architecture network security model classical encryption techniques symmetric cipher model substitution techniques transposition techniques steganography finite fields and number theory. However cryptography has not found a use for all kinds of finite fields.
However finite fields play a crucial role in many cryptographic algorithms. Finite fields of order p can be defined using arithmetic mod p. Cryptography and network security chapter 4 fifth edition by william stallings lecture slides by lawrie brown chapter 4 basic concepts in number theory and finite fields the next morning at daybreak star flew indoors seemingly keen for a lesson. It can be shown that the order of a finite field number of elements in the field must be a power of a prime p n where n is a positive integer.
Cryptography and network security chapter 4 fifth edition by william stallings lecture slides by lawrie brown infinite fields are not of particular interest in the context of cryptography. Computer and network security by avi kak lecture4 back to toc 4 1 why study finite fields. Check out this document that discusses encryption and its importance in protecting various types of sensitive information. It is almost impossible to fully understand practically any facet of modern cryptography and several important aspects of general computer security if you do not know what is meant by a finite field.
Polynomial arithmetic theoretical underpinnings of modern cryptography lecture notes on computer and network security by avi kak kak purdue edu may7 2020 12 29noon c2020avinashkak purdueuniversity goals. It can be shown that the order of a finite field. A finite field is simply a field with a finite number of elements. This means you can find finite fields of size 5 2 25 and 3 3 27 but you can never find a finite field of size 2 13 26 because it has two different prime factors.
I said tap eight. Advanced encryption standard encryption.