I logged in to Blogger, with no problem, yesterday. Today, after logging in successfully, I am asked for more details, to prove my identity!!This blog owner has a problem with location based security.
Not all Blogger blog owners or readers understand that Country Code Alias Redirection, and the ability to access one's Blogger / Google account (and prevent others from accessing it), both depend upon the ability to determine the geographical location of each blog reader.
Various Google features, like Country Code Alias Redirection, and Google login, use geolocation, to identify the location of each reader.
For people using the Internet, Geolocation uses the Internet connection, to determine physical location. Unfortunately, for many blog owners, the Internet Service Provider, the Internet connection, and the Internet customer (or Blogger blog reader) may each be in a different location.
My own location - even when I am at home - may, at times, appear to move in a 30 mile radius. My ISP routes my connection through any of half a dozen different connection points, in my region, depending upon current network activity.
Some smaller ISPs, located near a country border, may actually get service through a larger ISP in another country. Customers of the smaller ISP may appear, through geolocation, to reside in the other country.
This can be an unfortunate problem, with country code alias redirection, with language detection, with login authentication, and / or the Location option in Post Editor.
People located in one country, reading an unfamiliar language, or seeing their latest post show up in the wrong province / state - or even country - may not appreciate the confusion which is caused. And people who login, and appear to move from city to city in the region, grow tired of having to prove their identity - after successfully entering account name and password.
Thanks to domain based filtering, this may become a security issue for some blog owners, near country borders, who may not be able to maintain / publish their blogs.
Unfortunately, geolocation, using the Internet Address (aka "IP" address), will never return precise results. Any location based processes will always provide fuzzy results, thanks to Internet services which load balance their network connections.