Understanding JWT - Decoding the Full Form
JWT is a commonly used acronym in web development and API programming. But what does JWT stand for and what is its significance? Let's explore the full form and function of JWT.
Full Form: JSON Web Token
The full form of the abbreviation JWT is JSON Web Token. It refers to an open standard for securely transmitting information between parties in the form of a compact JSON object.
What is JSON?
JSON stands for JavaScript Object Notation. It is a lightweight data interchange format that is easy for humans and machines to read and generate. JSON represents data as key-value pairs and array data types.
JSON Web Tokens
A JSON web token or JWT contains JSON data that is cryptographically signed and encoded. It consists of three parts:
Header - specifies token type and algorithm used
Payload - contains claims or information like user ID
Signature - ensures token integrity
These three parts are encoded and concatenated with dots to create a JWT. The tokens are designed to be compact and transmitted through URLs, POST requests or HTTP headers.
Uses of JWT
Some common uses of JSON web tokens include:
Authorization - after login, the server generates a JWT to authorize user access
Information exchange - JWTs securely share information between parties
User details - tokens carry identifiable user information like username, roles etc.
In summary, JWT or JSON Web Token is a standardized authentication mechanism that provides secure transmission of verifiable user information across systems.
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