[SECURITY] Replace CryptoJS with the WebCrypto API

**Describe the security flaw**
CryptoJS is outdated and not using the newest tech available.

**How does this security flaw affect the software**
Better security and faster encryption/decryption

**Describe possible solutions**
Replace CryptoJS with the WebCrypto API and use AES-GCM together with PBKDF2
