Fermats theorem(Information Security)

1.Security goals https://youtu.be/b7kT0L9Nbpc 2.security attacks https://youtu.be/FcuH4zuI-dg 3.passive attack types https://youtu.be/EDBei7yey34 4.Basic terms in information security https://youtu.be/q9YLc55XBMs 5.Caesar cipher https://youtu.be/KaWUYvN9bL8 6.Affine cipher https://youtu.be/MSdk7C6V5ec 7.playfair cipher https://youtu.be/OMkEhDaLvM4 8.Multiplicative inverse https://youtu.be/C1mJ9xEW7c0 9.multiplicative cipher encryption https://youtu.be/B92Ft1XuKGc 10.multiplicative cipher decryption https://youtu.be/E5fNrpnjGh4 11.Autokey cipher https://youtu.be/S135M6QWtC0 12.Hill cipher https://youtu.be/JfzG9qpzYB4 13. Vernam cipher https://youtu.be/Y8m_gzdb3RY 14. Vigenere cipher https://youtu.be/L7VqXrvRNyg 15.Raifence cipher https://youtu.be/WRxkYMTX3rQ 16. Railfence cipher when depth not given https://youtu.be/aAKsaNH_mdQ 17.Columnar cipher https://youtu.be/IWeXjzxGkaE 18.Gcd of alphabets https://youtu.be/L89djAvStlg 19.Euclidean algorithm https://youtu.be/q4bGdsVjmC8 20.Extended Euclidean algorithm https://youtu.be/Di1AfdZjVKE 21.Euler's Totient function https://youtu.be/eBcGNGqVVQU 22.Fermat's Theorem https://youtu.be/VXWX335NCR4 23.Euler's Theorem https://youtu.be/lO3AkmmyTnY 24 .Chinese Remainder Theorem https://youtu.be/bWb4KTLFa1c 25)Diffie Hellman Key Exchange Cryptosystem https://youtu.be/vgDyT8WKGRQ 26) Simplified DES(Data Encryption standard) https://youtu.be/v8G4UllT9dc 27)RSA algorithm https://youtu.be/Om-dqEt3kTg 28) Elgamal Digital Signature Scheme https://youtu.be/2L9kDYqNBZ0