Write a script that inputs an encrypted four-digit integer and decrypts it to form the original number.

write python code Example 3: key length > block size Input data:Message: “Hello” → x48656C6C 6FSecret Key: “Y0S5INaG35isu0FJNlEPQeC5V9VCb5jPQ6cVBVVTKRov0Un7Wv6kDsVzfTdx5djqg9bQakXf3vxf5IU1sOnjZoUzKu” → x59305335 494E6147 33356973 7530464A 4E6C4550 51654335 56395643 62356A50 51366356 42565654 4B526F76 30556E37 5776366B 4473567A 66546478 35646A71 67396251 616B5866 33767866 35495531 734F6E6A 5A6F557A 4B75 Constants for our case hash algorithm (SHA1) with block size 64 bytes:ipad (in HEX): x36363636 36363636 36363636 36363636 36363636 36363636 36363636 36363636 36363636 36363636 36363636 36363636 36363636 36363636 36363636 36363636 (x36 repeated 64 time)opad (in HEX): x5C5C5C5C 5C5C5C5C 5C5C5C5C 5C5C5C5C 5C5C5C5C 5C5C5C5C 5C5C5C5C 5C5C5C5C 5C5C5C5C 5C5C5C5C 5C5C5C5C 5C5C5C5C 5C5C5C5C 5C5C5C5C 5C5C5C5C 5C5C5C5C (x5C repeated 64 time) Steps of creating HMAC (you could use the calculator to verify the result): If the key length > block size, we first hash the key, and then add 0s until…

write an encoder and a decoder for a modified "book cipher." A book cipher uses a document or book as the cipher key, and the cipher itself uses numbers that reference the words within the text. For example, one of the Beale ciphers used an edition of The Declaration of Independence as the cipher key. The cipher you will write will use a pair of numbers corresponding to each letter in the text. The first number denotes the position of a word in the key text (starting at 0), and the second number denotes the position of the letter in the word (also starting at 0). For instance, given the following key text (the numbers correspond to the index of the first word in the line)   [0] 'Twas brillig, and the slithy toves Did gyre and gimble in the wabe; [13] All mimsy were the borogoves, And the mome raths outgrabe. [23] "Beware the Jabberwock, my son! The jaws that bite, the claws that catch! [36] Beware the Jubjub bird, and shun The frumious Bandersnatch!" [45] He took his vorpal sword in…

Write a FORTRAN 90 program that calculates the real roots of any quadratic equation ax? + bx + c = 0 for given values of a, b and c. The program should print a message on screen if the roots are imaginary and should also be able to solve the equation if a = 0. -btvb2-4ac DET. = b? - 4ac , root = 2a