Arduino Uno rev3

Security Evaluation

1. Device Security

Criterion	Value	Proof	Comment
Known hardware tampering	Rare	[1] 🔗 Proof
Known vulnerabilities	Rare	[2] 🔗 Proof
Prior attacks	Rare	🔗 Proof
Updatability	Rare	🔗 Proof
Category Score	Score: 2 / 3

2. System Security

Criterion	Value	Proof	Comment
Authentication with other systems	Partial	🔗 Proof
Communications	Encrypted with obselete encryption	[3] 🔗 Proof
Storage	Encrypted with obselete encryption	[4] 🔗 Proof	For storage encryption, it's better to use an ESP32 (you can find ESP32's page on Wiki IoT, link here http://fehmijaafar.net/wiki-iot/index.php/Espressif_ESP32)
Category Score	Score: 2 / 3

3. User Authentication

Criterion	Value	Proof	Comment
Account management	Absent	—	No account on the microcontroller
Authentication	Absent	—
Brute-force protection	Absent	—
Event logging	Partial logging	🔗 Proof
Passwords	Default/Common/Easy to guess	—	No password on the chip
Category Score	Score: 3 / 3

Technical Specifications

Property	Details
Operating System & App	(Companion App: )
Hardware (CPU / GPU)	CPU: ATmega328 - 8-bit AVR® RISC-based microcontroller • GPU:
Memory & Storage	Memory: 2KB SRAM • Storage: 1KB EEPROM - 32KB Flash
Power, Battery & Charging	Battery: • Power: 2.7-5.5 volts • Charging:
Display & Camera	Display: • Camera:
Sound & Connectivity	Sound: • Connectivity: 1 x USART, 1 x AC, 1 x SPI, 1 x I2C
Physical (Dimensions & Mass)	Dimensions: 68.6 mm x 53.4 mm • Mass: 25 g

Arduino could be a good choice for beginners and to learn to code and use sensors on IoT devices. However it's not the best choice for business. If you want some cheaper microcontroller with a better security, ESP will be better with ESP8266 http://fehmijaafar.net/wiki-iot/index.php/Espressif_ESP8266 and ESP32 http://fehmijaafar.net/wiki-iot/index.php/Espressif_ESP32.