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.
Most standard light truck and passenger tires have tire load index ratings between 70 and 110, but drivers should consider a higher tire load index rating if they consistently haul heavy equipment. Below is a load index chart that converts common ratings into their proper load capacities. When choosing new tires, it's important to have a load index that is at least as high as the one listed on the sidewall or doorjamb placard. Learn more on how to read tire size.