diff options
| author | prashantsinalkar | 2017-10-10 12:27:19 +0530 |
|---|---|---|
| committer | prashantsinalkar | 2017-10-10 12:27:19 +0530 |
| commit | 7f60ea012dd2524dae921a2a35adbf7ef21f2bb6 (patch) | |
| tree | dbb9e3ddb5fc829e7c5c7e6be99b2c4ba356132c /3544/CH4/EX4.5.3/Ex4_5_3.sce | |
| parent | b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b (diff) | |
| download | Scilab-TBC-Uploads-7f60ea012dd2524dae921a2a35adbf7ef21f2bb6.tar.gz Scilab-TBC-Uploads-7f60ea012dd2524dae921a2a35adbf7ef21f2bb6.tar.bz2 Scilab-TBC-Uploads-7f60ea012dd2524dae921a2a35adbf7ef21f2bb6.zip | |
initial commit / add all books
Diffstat (limited to '3544/CH4/EX4.5.3/Ex4_5_3.sce')
| -rw-r--r-- | 3544/CH4/EX4.5.3/Ex4_5_3.sce | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/3544/CH4/EX4.5.3/Ex4_5_3.sce b/3544/CH4/EX4.5.3/Ex4_5_3.sce new file mode 100644 index 000000000..35d0259ab --- /dev/null +++ b/3544/CH4/EX4.5.3/Ex4_5_3.sce @@ -0,0 +1,30 @@ +
+//ElGamal Key Decryption
+
+// Move scilab to current file directory
+[u,t,n] = file()
+n = strcat(n)
+file_name = basename(n)+fileext(n)
+file_name = strcat(file_name)
+ind=strindex(n,file_name)
+path = part(n,1:ind-1)
+chdir(path)
+
+exec("Chapter_4.sci",-1)
+
+p = 11
+r = 4
+pt = 7
+d = 3
+e1 = 2
+e2 = modulo(e1^d,p)
+
+c1 = modulo(e1^r,p)
+c2 = modulo(pt*e2^r,p)
+
+x =c1^d
+x_inv = mod_inv(x,p)
+
+pt = modulo(c2*x_inv,p)
+disp("Original plaintext")
+disp(pt)
|