A cookie is a tiny data file, also known as an HTTP cookie, browser cookie or web cookie stored in a user’s web browser while the user is browsing the website. The main purpose of a cookie is to track the data pertaining to user’s usage for good visitor experience. Therefore, Paycoin apply flask cookies for account security including both session and persistent cookies. By using this flask cookies paycoin can only takes the authority to interpret the information stored on them. The user can rely on the website as any sensitive information in these cookies is encoded.