Consumers spent more than $5 billion online by the end of the day on Black Friday, Adobe says. Major retailers, like Amazon, Walmart and Target continue to see ecommerce sales on the rise. Not all retailers have raised the bar when it comes to security, but not all have done so well, according to the study. Some retailers scored an A despite having some deficiencies in security practices, the study found. The study also found that security breaches occurred at major retailers in the U.S.”]