wich sites does not use 3d secure

Many online merchants and e-commerce sites use 3D Secure (Three-Domain Secure) as an added layer of security for online credit card transactions. However, some websites may not implement 3D Secure for various reasons, such as the cost or complexity of integration, target market preferences, or the nature of the products being sold. Some common types of sites that may not use 3D Secure include: 1. **Small Businesses**: Smaller retailers or local businesses might not have the resources to implement 3D Secure. 2. **Digital Goods Sellers**: Some websites that sell digital products (like e-books, music, or software) may choose not to implement 3D Secure due to the quick nature of the transactions. 3. **Subscription Services**: Some subscription-based services may avoid 3D Secure for ease of use, particularly if they want to ensure smoother recurring billing. 4. **Certain Marketplaces**: Some online marketplaces may opt-out of 3D Secure for certain transactions to enhance user experience. 5. **Unofficial or Low-Trust Sites**: Websites that are not well-known or that have lower reputations might not use 3D Secure out of a lack of understanding of best practices or due to underinvestment in security measures. Always be cautious when entering payment information online, especially on sites that do not use additional security protocols like 3D Secure. To ensure safety, look for signs of security measures, such as HTTPS in the website URL and trust badges from recognized organizations.