JSON Web Encryption (JWE)
JSON Web Encryption (JWE) is an open standard for representing encrypted content as base64url encoded JSON data.
JWE Resources
Broader Topics Related to JSON Web Encryption (JWE)

Base64url
The URL-compatible form of base64 encoding

IETF Standards
Standards set by the IETF

JSON Object Signing and Encryption (JOSE)
A set of technologies used to encrypt and sign content