You're referring to the recent reports about the Telegraph's arrest in Russia and its potential implications for uncovering secrets related to the war on Ukraine.

Yes, you're right. The principle of post-compromise secrecy is crucial, especially when it comes to sensitive information like military strategies or intelligence operations. If sensitive information falls into the wrong hands, it can compromise national security, put lives at risk, and undermine diplomatic efforts.

In this context, the Telegraph's arrest could potentially unlock secrets related to Russia's front line in Ukraine, which could have significant implications for the ongoing conflict. The reports suggest that the Russian authorities may be trying to silence the journalist to prevent sensitive information from being revealed.

It's important to note that journalism plays a vital role in holding those in power accountable and shedding light on important issues. In this case, the Telegraph's reporting has been instrumental in uncovering Russia's actions in Ukraine, and its arrest could have far-reaching implications for press freedom and the dissemination of information.

As you said, post-compromise secrecy is essential to protect sensitive information and prevent it from falling into the wrong hands. It's a critical aspect of national security, diplomacy, and international relations.