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As modern applications rely heavily on interconnected microservices, data protection largely depends on the strength of API cryptography. Unfortunately, cryptography is notoriously difficult to implement correctly. Developers frequently fall back on habits that introduce invisible vulnerabilities into production systems.

Understanding these common cryptographic anti-patterns is the first step toward securing modern APIs against exploitation.

Conflating Encoding with Encryption

One of the most widespread misunderstandings is treating data encoding (such as Base64 or URL encoding) as a form of security.