Any shared private key method - symmetric encryption.
Symmetrical Key Cryptography. Both parties encrypt and decrypt with the same secret. Also called "Previous Shared Secret" Encryption
You need to choose stronger encryption and longer encryption key.
decode
Upgrade to the LEAP wireless security protocol.
Encryption is the answer
traffic encryption key
The Colossus was created to decode encrypted messages from Germany during World War Two using the infamous "Enigma" machine. For full rundown see Simon Singh's "The Code Book".
The first proper computers were used to help the Allies decode German encrypted messages during World War II.
It is: A C B 8 YKK 8.
You will have to know the encryption algorithm and the key used. If you do not know these you will need to use cryptanalysis to "crack" it. This is not easy (obviously).
Yes, the basic underlying concept is still same . First encryption is done and then to decode the original text decryption is done..
XOR cipher is a form of encryption algorithm. In simple terms, the cipher is used to decode binary language. For more details, Wikipedia is a great resource.
If the keys are different, then it is asymmetrical. If it is the same key used twice to encode and decode; then it is symmetrical.