A valid digital signature gives a recipient reason to believe that the message was created by a known sender (authentication), that the sender cannot deny having sent the message (non-repudiation), and that the message was not altered in transit (integrity).
Load index is an assigned number that corresponds with the load-carrying capacity of a tire. Most passenger car tire load indexes range from 75 to 100, but a few carry more. You'll also find the maximum load elsewhere on the tire sidewall, both in lbs and kg.
The load index is a number that corresponds to the physical load-handling weight of a tire in kilograms or pounds. The load index can be used as a cross reference to find the weight in pounds or kilos. For example, a load index of 105 corresponds to 2,039 pounds or 925 kilograms. This chart is found inside the vehicle's door jams and is available in tire replacement shops. The Tire Rack: Load Range Identification.