Older versions of WinRAR used variable iteration counts and other "shenanigans" for password hashing, whereas the latest versions (WinRAR v5) use a more straightforward PBKDF2/SHA256 process.
Whether it is related to ? The Retail Equation | Was your return denied? shenanigans.rar
Some shoppers find the reports "absurd" because they can trigger a "warning receipt" or a complete ban on future returns even for simple, even exchanges. Older versions of WinRAR used variable iteration counts