RFID (Identificação por rádio freqüência) As etiquetas invioláveis são etiquetas especialmente concebidas para impedir ou notificar quando é detetada uma tentativa de violação. Essas etiquetas geralmente contêm um chip RFID e uma antena que emite um sinal quando a etiqueta é removida do objeto ao qual está conectada ou danificada. This technology is widely used in asset management, supply chain monitoring, anti-theft and security fields.
![](https://www.rfidhy.com/wp-content/uploads/2024/07/fc6737a8-3820-4977-8f95-3cebcc26e274-1024x683.jpg)
There are usually two working principles of tamper-proof tags:
Physical switch mechanism: When the tag is removed from the object it is attached to, a physical switch opens or closes, which changes the read signal of the RFID tag. The monitoring system can infer whether the tag has been illegally removed by reading the change in the signal.
Tamper-detection material: The tag may contain a special material that changes the circuit of the RFID chip once the tag is damaged, causing the signal to change.
In practical applications, RFID tamper-proof tags can be integrated with access control systems, alarm systems or other security systems to immediately sound an alarm when the tag is tampered. Por exemplo, using these tags on library books, high-value goods or sensitive data devices can immediately notify administrators when unauthorized removal attempts are made.