In the fintech world, encryption is not a luxury—it's a necessity. Every transaction, every user interaction, and every piece of sensitive data exchanged online needs to be secure. Encryption provides the shield that keeps unauthorized parties at bay, safeguarding financial transactions and customer information. But in a sea of cryptographic options, fintech systems frequently rely on four particular encryption algorithms. Let’s dive deeply into each, understanding not only how they work but also why they’re critical to financial technology.