# item.guide
Side-by-Side Comparison Smart Cards & RFID

RAIN RFID / EPC Gen2 vs. HID Prox & iCLASS

Comparing 2 standards across 13 specifications. 13 key differences identified.

Comparing:
RAIN RFID / EPC Gen2
HID Prox & iCLASS

RAIN RFID (ISO/IEC 18000-63 / GS1 EPC Gen2) is an Ultra-High Frequency (UHF, 860–960 MHz) wireless standard utilizing electromagnetic backscatter coupling. Enabling simultaneous inventory reading of hundreds of passive tags per second over distances up to 12 meters, it is the global standard for retail apparel, aviation baggage, and logistics supply chains.

View full RAIN RFID / EPC Gen2 spec sheet →

HID Prox and iCLASS are proprietary physical access control credentials developed by HID Global. They encompass legacy 125 kHz unencrypted Prox (such as 26-bit Wiegand H10301), 13.56 MHz read/write iCLASS smart cards, and modern Seos microprocessor cards utilizing AES-128 encryption.

View full HID Prox & iCLASS spec sheet →

Specification Comparison Table

13 Parameters
Parameter / Spec
Operating Frequency Band
860–960 MHz (865–868 MHz EU / 902–928 MHz US)
Standard Specifications
GS1 EPC Gen2 v2 / ISO/IEC 18000-63
Communication Mechanism
Passive Modulated Backscatter (Far-field EM)
Typical Read Range
5 to 12 m (passive tags)
Inventory Read Speed
Up to 1,000 tags/sec
Forward Link Modulation
DSB-ASK, SSB-ASK, or PR-ASK (PIE encoding)
Return Link Modulation
FM0 or Miller Subcarrier (40 to 640 kbps)
Memory Banks
Reserved (Kill/Access passwords), EPC, TID (Factory ID), User Memory
Operating Frequencies
125 kHz (Prox) / 13.56 MHz (iCLASS / Seos)
Common Bit Formats
26-bit H10301, 37-bit H10302/H10304, Corporate 1000
Standard Compliance (iCLASS)
ISO/IEC 15693 and ISO/IEC 14443-A/B
Security Cryptography
None (Prox), 64-bit DES (Legacy iCLASS), AES-128 (iCLASS SE / Seos)
Reader Interface Protocol
Wiegand / OSDP (Open Supervised Device Protocol)