Several employees of the world's largest banks actually tried this. Result? Almost $2 billion in fines.

https://www.wsj.com/articles/wall-street-to-pay-1-8-billion-...

That’s interesting, thanks.

Article is paywalled, but how can it be proved they’re using something like Signal? There must be at least some discussion available to be disclosured on request by law? How do they define if the subject is relevant enough to require a formal exchange between executives?

The world of big public companies is fascinating.

I have to imagine any requirements on email retention would apply to signal too, and that your phone with its local plaintext database can be subpoenaed.

The threat model for signal is not to get you out of your legal obligation to comply with court orders.

I don't understand? As long as someone has the relevant decrypted message chain it can be subpoenaed.