Using 3DES decryption to get a specific result I want to get 3DES to get a predictable result; assume I have:

key: [any]

data: [any]


then I want to apply 3DES decryption on key and data to get a specific result, such as:

decrypted 3DES: 12121212121212121212121212121212


Is this possible in theory?
I want to apply 3DES decryption on key and data to get a specific result. Is this possible in theory?


Sure. 3DES is a functionally correct encryption scheme for any fixed key, so for any message there exists a(t least one) corresponding ciphertext value.

So if you want to have a specific decryption result $m$ using a specific key $k$, you simply choose the ciphertext $c$ as $c=E_k(m)$ and by correctness $D_k(c)=D_k(E_k(m))=m$.