An HMAC is a MAC which is based on a hash function. The basic idea is to concatenate the key and the message, and hash them together. Since it is impossible, given a cryptographic hash, to find out what it is the hash of, knowing the hash (or even a collection of such hashes) does not make it possible to find the key.
Homefacts City Report. Burns Harbor is located in Porter County, IN. The population is 1,293. There are 0 public schools in Burns Harbor with an average Homefacts rating of NA. The total crime rate for Burns Harbor is very low, and there are 0 registered sex offenders residing in the city. Unemployment in Burns Harbor is moderate and the median home sales price is $0.
Fountain County, Indiana. Fountain County lies in the western part of the U.S. state of Indiana on the east side of the Wabash River. The county was officially established in 1826 and was the 53rd in Indiana. The county seat is Covington. According to the 2000 census, its population was 17,954; the 2010 population was 17,240.