Adding Controlled Noise to Signal
Definitely need more details about the type of information, and how it might be vulnerable to uninvited observability. Assuming it's some type of n-bit bus, my first thought is that you should encrypt the data, using a secret key code, so only someone with the key code can decrypt and recover the original data. 

Noise, as an engineering term, is random and unpredictable, requiring a denoising filter/algorithm to obtain something close to the original data. Rarely can you recover all of the original data.