> If these bits are supposed to be as unpredictable as possible
That isn't the purpose of the embedded headlines. They are to show that the canary file was not created and signed two years ago and only just now posted to the website.
They serve the same purpose as what used to be used in movies and TV years ago for "kidnapping" story lines where a photo of the kidnapped person, holding up a current copy of some major newspaper, was sent to the person who was being asked to pay the ransom (or perform some other action) in order to secure release of the kidnapped individual. They show that the item in question is current and not prepared well in advance.
That is understood. The life cycle of canary is n days, in this case apparently 7 days. Industrial output, economic stats, health of world figures, and Vatican whispers are precisely what a state intelligence agency is supposed to know before the general public. The idea is that the message embeds bits of information that were disclosed at a specific point in time and my point is that these types of bits are not that that unpredictable for the sort of adversary that necessitates canaries.
That isn't the purpose of the embedded headlines. They are to show that the canary file was not created and signed two years ago and only just now posted to the website.
They serve the same purpose as what used to be used in movies and TV years ago for "kidnapping" story lines where a photo of the kidnapped person, holding up a current copy of some major newspaper, was sent to the person who was being asked to pay the ransom (or perform some other action) in order to secure release of the kidnapped individual. They show that the item in question is current and not prepared well in advance.