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send_end.py.py
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send_end.py.py
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import socket
target_ip="127.0.0.1"
target_port=2222
a=4
def encrypt(text,s):
result = ""
# traverse text
for i in range(len(text)):
char = text[i]
# Encrypt uppercase characters
if (char.isupper()):
result += chr((((ord(char) + a)-65) % 26) + 65)
# Encrypt lowercase characters
else:
result += chr((((ord(char) + a) - 97) % 26) + 97)
return result
#decryption
def decrypt(text,a):
result = ""
# traverse text
for i in range(len(text)):
char = text[i]
# Encrypt uppercase characters
if (char.isupper()):
result += chr((((ord(char) - a)-65) % 26) + 65)
# Encrypt lowercase characters
else:
result += chr((((ord(char) - a) - 97) % 26) + 97)
return result
#now we are creating UDP socket -- this remains same for sen/rev
# using ipv4
s=socket.socket(socket.AF_INET,socket.SOCK_DGRAM)
#this for senders
#while 5-3:
while True:
msg=input("please enter your msg:-")
result=encrypt(msg,a)
newmsg=result.encode('ascii') #we are encoding string to byte like object in python3
s.sendto(newmsg,(target_ip,target_port)) #now we can send to target
server=s.recvfrom(100)
newmsg=(server[0].decode('ascii'))
result=decrypt(newmsg,a)
print(result)