What’s the shortest message you need to claim ownership of another message?

Hypothetically, I’d like to demonstrate that I am the owner of a piece of published information. The requirements are the following.

The hash/ characteristic string is compact enough (ideally a few bytes, say 16 or 32.)
It does not expose… Continue reading What’s the shortest message you need to claim ownership of another message?

When a detection tool fires no alert, how to tell the difference if the environment is safe or just something is wrong with the tool

For example, if an antivirus gives no alert for a couple of months, how do you confirm if the antivirus is working to prevent viruses, and not just hung?

Continue reading When a detection tool fires no alert, how to tell the difference if the environment is safe or just something is wrong with the tool

Should password strength validation also be run server-side or only client-side?

Personally, I think that it’s not so important to check the strength of the passwords on server-side, since, if the user evades the validation on the client side, it would be their responsibility to use an insecure password; however, I don… Continue reading Should password strength validation also be run server-side or only client-side?