SAP to NRA Document Processing Workflow - MiniPC with SIM Card Architecture

2. OFFICE LOCATION (INDEPENDENT NETWORK)
4G/5G Mobile Network
External Fixed IP
iDoc XML FTP via 4G/5G PKCS#11 4G/5G Signed XML via 4G/5G Status Response
1
SAP
SAP System
• ERP System
• Document source
• iDoc format output
2
iDoc XML
iDoc Converter
• Convert iDoc to XML
• Upload to FTP server
3
FTP Server
• Storage: XML files
• Protocol: FTP/SFTP
• Access: Read/Write
4
MiniPC Windows
• Service: TakeControlAppService
• Network: 4G/5G Mobile (Independent)
• Location: Office (No LAN)
• Operations:
  - Download XML via mobile network
  - Sign with USB token
  - Send to NRA via 4G/5G
  - Listen for results from NRA
  - Automatic update
5
USB Token
• Type: Hardware HSM
• Cert: X.509
• PIN: Pre-defined
6
4G/5G
SIM Card Module
• Type: Mobile Data SIM
• Network: 4G/5G
• Purpose: Independent Internet
• No LAN dependency
7
NRA
National Revenue Agency
• API: Web Service
• Auth: Certificate-based
• Validation: Digital signature

Process Flow Details - MiniPC with Mobile Network

1.
SAP System: Generates iDoc documents from business transactions
2.
iDoc Converter: Transforms iDoc format to XML and uploads to FTP server
3.
FTP Server: Stores XML files
4.
MiniPC Windows (Office): Take Control App downloads XML files via 4G/5G mobile network
5.
USB Token: Signs documents using pre-definer PIN code to the device
6.
SIM Card: Provides independent 4G/5G internet connectivity, bypassing LAN network requirements
7.
NRA Processing: Receives signed XML via mobile network, validates signature, returns status