Мамлакатимизда аxборот-коммуникация

partial
class
Form3
: 
Form 
{ 
public
Form3() 
{ 
InitializeComponent(); 
Form2
f2=
new
Form2
(); 
richTextBox1.Text = f2.richTextBox3.Text; 
} 
OleDbConnection
oldb = 
new
OleDbConnection
(
"Provider=Microsoft.Jet.OLEDB.4.0; Data Source=Sherzod 
aka.mdb"
); 
public
long
y,a,b,n,R,D; 
private
void
button1_Click(
object
sender, 
EventArgs
e) 
{ 
richTextBox4.Text = 
""
; 
richTextBox5.Text = 
""
; 
richTextBox6.Text = 
""
; 
a = 1; 
b = 1; 
R = 19; 
y = 
Convert
.ToInt64(label5.Text); 
D = 
Convert
.ToInt64(label3.Text); 
n = 
Convert
.ToInt64(label2.Text); 
richTextBox4.Text = deshifrlash(richTextBox3.Text, D, n); 
richTextBox5.Text = deshifrlash(richTextBox2.Text, D, n); 

---

98 
richTextBox6.Text = parametrik(1, 1, 19, n, y, 
richTextBox1.Text); 
} 
public
string
parametrik(
long
a, 
long
b, 
long
R, 
long
n, 
long
kalit, 
string
matn) 
{ 
long
matn1 = 
Convert
.ToInt64(matn); 
string
shifr = 
Convert
.ToString((matn1 * a + kalit * b + R * 
matn1 * kalit) % n); 
return
shifr; 
} 
public
string
natija = 
""
; 
public
string
deshifrlash(
string
matn,
long
D,
long
n) 
{ 
int
g=0; 
string
yoz=
""
; 
double
[] massiv = 
new
double
[matn.Length /n.ToString().Length]; 
for
(
int
y=0;y{ 
yoz+=matn[y]; 
if
(yoz.Length == n.ToString().Length) 
{ 
massiv[g] = 
Convert
.ToDouble(yoz); 
yoz = 
""
; 
g++; 
} 
} 
double
daraja; 
double
qoldiq = 1; 
string
natija = 
""
; 
for
(
int
i = 0; i { 
for
(
int
j = 1; j <= D; j++) 
{ 
daraja = qoldiq * massiv[i]; 
qoldiq = daraja % n; 
} 
string
sanash 
=
Convert
.ToChar(
Convert
.ToInt32(qoldiq)).ToString(); 
natija+= sanash; 
qoldiq = 1; 
} 
return
natija; 
} 
string
ikkilik(
string
plain_text) 
{ 
string
srt = 
""
; 
string
str1 = 
""
; 
int
plantextuzunligi = plain_text.Length; 
for
(
int
i = 0; i < plantextuzunligi; i++) 
{ 
int
charCode = 
Convert
.ToInt32(plain_text[i]); 
int
k2; 
for
(
int
j = 7; j >= 0; j--) 
{ 
k2 = (charCode >> j) & 1; 
srt += 
Convert
.ToString(k2); 
}
} 
for
(
int
i = 0; i < srt.Length; i++) 
{ 
if
(srt[i] == 
'0'
) 

---

99 
str1 += 
"1"
; 
else
str1 += 
"0"
; 
} 
return
str1; 
} 
private
void
richTextBox6_TextChanged(
object
sender, 
EventArgs
e) 
{ 
} 
private
void
button2_Click(
object
sender, 
EventArgs
e) 
{ 
string
soz = richTextBox4.Text; 
byte
[] dataArray = 
Encoding
.ASCII.GetBytes(soz); 
HashAlgorithm
sha = 
new
SHA1CryptoServiceProvider
(); 
byte
[] result = sha.ComputeHash(dataArray); 
soz = 
""
; 
for
(
int
i = 0; i < result.Length; i++) 
{ 
soz+= result[i].ToString(); 
} 
string
ii = richTextBox6.Text; 
if
(richTextBox6.Text == soz.Substring(0, 4)) { label1.Visible = 
true
; richTextBox6.Text = ii + 
" "
+ soz.Substring(0, 4); } 
else
{ label1.Visible = 
true
; label1.Text = 
"Imzo haqiqiy emas"
; 
richTextBox6.Text = ii + 
" "
+ soz.Substring(0, 4); } 
richTextBox6.Text = 
""
; 
} 
}