Secure online transactions between parties are facilitated by technologies such as encryption and blockchain. Encryption ensures that data exchanged during a transaction is scrambled and protected from unauthorized access, while blockchain provides a decentralized platform that records transactions transparently and securely. By combining these technologies, parties can conduct transactions with decreased risk of fraud and increased trust. Furthermore, smart contracts can automate processes within these transactions, ensuring that terms are met before the exchange of assets, adding another layer of security.