References¶

The documents the implementation and these pages rely on, at the versions used.

TROPIC01¶

All from tropicsquare/tropic01 at commit 90747ca.

Short name	Document
Datasheet	ODD_TR01 datasheet A.11 (2025-11-11)
User API	ODU_TR01 User API 1.4.0
PIN verification	ODN_TR01_app_002 PIN Verification 1.2
PKI	ODN_TR01_app_003 PKI 1.3
First pairing key	ODN_TR01_app_005 1.3
Configuration objects	ODN_TR01_app_006 1.3
Firmware update	ODN_TR01_app_007 1.5
Security architecture	ODN_TR01_app_008 1.1
Catalog list	OD_TR01 Catalog List 2.0
Part page and errata	TR01-C2P-T101
LFI advisory	ODR_TR01_SA_2026012900 1.0 (disclosed 2026-06-03)
SDK	libtropic v3.2.1
Board	TS1302 stock firmware and schematic

Document
DS14217	STM32U535xx datasheet, Rev 5
RM0456	STM32U5 reference manual
ES0587	STM32U535/545 errata sheet
AN5347	TrustZone and RDP on STM32U5
AN4759	RTC and TAMP (backup registers, boot hardware key)

Which specification each USB interface of the dongle follows:

USB interface	Follows	Key sections
FIDO2 (HID, usage page `0xF1D0`)	CTAP 2.2 for the USB HID transport; selected CTAP 2.1 authenticator commands (GetInfo reports `FIDO_2_0`, see status)	transport: §11.2 USB, KEEPALIVE, CANCEL, INIT; commands: §6 Authenticator API, §8 Message encoding
Smart card (CCID)	USB CCID 1.1 for the transport, ISO/IEC 7816-4 for the APDUs, OpenPGP card 3.4.1 for the application	Ed25519 / Cv25519 keys, PINs, touch policy (UIF): see card setup
Debug build only: CDC console, lt-rpc HID	project-specific	architecture

Specification	Version
FIDO CTAP 2.2	Proposed Standard, 2025-07-14 (USB HID transport)
FIDO CTAP 2.1	Proposed Standard, 2021-06-15 (the command level implemented)
W3C WebAuthn	Level 2
OpenPGP smart card application	3.4.1
USB-IF Smart Card CCID class	1.1
ISO/IEC 7816-4	2020 (commands and responses; paywalled)
Noise Protocol Framework	revision 34