diff --git a/algorithms/cryptography/Hill_cipher.py b/algorithms/cryptography/Hill_cipher.py
new file mode 100644
index 0000000..943c463
--- /dev/null
+++ b/algorithms/cryptography/Hill_cipher.py
@@ -0,0 +1,42 @@
+import numpy as np
+s=list(input("Enter a string"))
+c=[]
+for i in range(len(s)):
+ c.append(ord(s[i])-65)
+
+arr= np.array(c)
+
+a1=np.transpose(arr)
+print(a1)
+a1= a1.reshape(3,1)
+print(a1.shape)
+
+
+#key input
+print("Enter the key for the encryption")
+R = int(input("rows:"))
+C = int(input("columns:"))
+matrix = []
+print("Enter the key:")
+
+for i in range(R):
+ a =[]
+ for j in range(C):
+ a.append(int(input()))
+ matrix.append(a)
+
+for i in range(R):
+ for j in range(C):
+ print(matrix[i][j], end = " ")
+matrix = np.array(matrix)
+print(matrix.shape)
+print(matrix[1][1])
+
+mul=np.matmul(matrix,a1)
+mul = np.array(mul)
+print(mul.shape)
+print(mul)
+for i in range(R):
+ mul[i]=mul[i]%26
+
+print(mul)
diff --git a/algorithms/cryptography/railfence_cipher.py b/algorithms/cryptography/railfence_cipher.py
new file mode 100644
index 0000000..0cdf24a
--- /dev/null
+++ b/algorithms/cryptography/railfence_cipher.py
@@ -0,0 +1,78 @@
+def railencrypt(st,k):
+ c = 0
+ x = 0
+ m =[[0] * (len(st)) for i in range(k)]
+ for r in range(len(st)):
+ m[c][r] = st[r]
+ if x == 0:
+ if c == (k-1):
+ x = 1
+ c -= 1
+ else:
+ c += 1
+ else:
+ if c == 0:
+ x = 0
+ c += 1
+ else:
+ c -= 1
+
+ result = []
+ for i in range(k):
+ for j in range(len(st)):
+ if m[i][j] != 0:
+ result.append(m[i][j])
+ print("CipherText:","" . join(result))
+
+def raildecrypt(st,k):
+ c , x = 0 , 0
+ m =[[0] * (len(st)) for i in range(k)]
+ for r in range(len(st)):
+ m[c][r] = 1
+ if x == 0:
+ if c == (k-1):
+ x = 1
+ c -= 1
+ else:
+ c += 1
+ else:
+ if c == 0:
+ x = 0
+ c += 1
+ else:
+ c -= 1
+ result = []
+ c , x = 0 , 0
+ for i in range(k):
+ for j in range(len(st)):
+ if m[i][j] == 1:
+ m[i][j] = st[x]
+ x += 1
+ for r in range(len(st)):
+ if m[c][r] != 0:
+ result.append(m[c][r])
+ if x == 0:
+ if c == (k-1):
+ x = 1
+ c -= 1
+ else:
+ c += 1
+ else:
+ if c == 0:
+ x = 0
+ c += 1
+ else:
+ c -= 1
+ print("PlainText:","" . join(result))
+
+if __name__ == "__main__":
+ string = input("Enter the Message:")
+ string = string.upper()
+ key = int(input("Enter the Key:"))
+ n = int(input("1.Encryption\n2.Decryption\nInput Your choice:"))
+ if(n == 1):
+ railencrypt(string,key)
+ elif(n == 2):
+ raildecrypt(string,key)
+ else:
+ print("Error")
pFad - Phonifier reborn
Pfad - The Proxy pFad of © 2024 Garber Painting. All rights reserved.
Note: This service is not intended for secure transactions such as banking, social media, email, or purchasing. Use at your own risk. We assume no liability whatsoever for broken pages.
Alternative Proxies:
Alternative Proxy
pFad Proxy
pFad v3 Proxy
pFad v4 Proxy