cipher key การใช้

In the seditious articles and documents, and also possession of a cipher key.
In contrast, the security of ciphers is generally dependent on protecting the cipher keys.
The keyword together with the conventions for filling in the 5 by 5 table constitute the cipher key.
Cipher keys can be stolen and people can betray them, but they are much easier to change and distribute.
The cipher key length can vary between 128 and 256 bits, but the guaranteed security is only 128 bits.