Decryption - Side-channel Attack Technology ID
The research ID for Decryption - Side-channel Attack in Hearts of Iron IV is improved_decryption.
Decryption - Side-channel Attack

Engineering1940
Unlock this technology with the research command and the tech ID improved_decryption.
About this technology
The development of more sophisticated computers allows for new applications of cryptanalysis methods like differencing, which can be used to break advanced cyphers when combined with new hand codebreaking methods.