What Is Cryptography? And How to Encrypt Data in Postman

APIs, crucial for data exchange over the internet, require robust security measures to prevent data manipulation by malicious third parties, highlighting the importance of cryptography in securing data on insecure networks. Cryptography involves using mathematical algorithms to protect sensitive information, ensuring only authorized parties can access it through encryption and decryption methods. The text outlines three main types of cryptography: hash functions, which transform text into a fixed value without keys and are useful for password verification; symmetric key encryption, where the same key is used for both encryption and decryption, exemplified by AES and DES; and asymmetric key encryption, which uses a public key for encryption and a private key for decryption, as seen in algorithms like RSA. Postman, a platform for API development, facilitates the use of cryptography through various external libraries such as Crypto.js, enabling developers to apply encryption in API requests and test scripts. The discussion underscores that encrypting data significantly enhances its security compared to leaving it unprotected, urging users to explore more cryptography algorithms for diverse applications.

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