White label, round, with a diameter of 29 mm, equipped with NXP NTAG424 DNA chip

The NTAG 424 DNA chip sets a new standard in NFC and secure IoT applications. The new chip generation offers state-of-the-art security and privacy protection features. For this purpose, the chip is made with attack-resistant certified silicon.

The NTAG 424 DNA chip is designed to support operations protected by AES-128 encryption, including a new SUN (Secure Unique NFC message) authentication mechanism, as well as the protection of sensitive data with encrypted access permissions. These features allow advanced product and content protection, as well as secure and unique user experiences in real time.

What is the SUN message

The Secure Unique NFC function generates a unique and secure authentication code whenever the Tag is read. With the SUN function, an NDEF message (readable by any NFC smarpthones) is generated, using an encryption algorithm that includes: URL, UID, counter scan, and AES key.

Being also connected to the scan counter, each time the Tag is read, it generates a different string. In this way, the content is protected from cloning.

It is interesting to note that this increase in security is at the same time a simplification of the approach to the end user, which does not need to download any specific application to verify the authenticity of the Tag (and the content linked to it).

Technical features

• Available memory: 256 bytes (for NDEF message)
• Adhesive dimensions: 29 mm (diameter)
• Operating temperature of the chip: -25°C ÷ 70°C
• Storage temperature: -55°C ÷ 125°C
• Operating frequency: 13.56 MHz

Applications

• Anti-counterfeiting
• Secure login
• Token generation
• Product authenticity
• Applications that handle sensitive data

For an animated illustration of how the encryption algorithm that generates the SUN message works, click here

Custom printing

These NFC Tags are white. We can print directly on this tag, in black and white or in full color.

A printing tolerance of about 1-2 mm should be considered. To achieve the best results, it is recommended to avoid:

• Designs printed to the edge (except from offset printing)
• Graphic elements such as frames
• Important elements very close to the edge

Black printing (1-2 days) is done with the thermal transfer technique. It is a low quality print, but very resistant and economical. It is normally used for serials, barcodes or QR codes. However, simple logos can also be printed.

UV printing (1-5 days) is a color printing technique that can be performed directly on white labels. The print is in CMYK and the result is semi-opaque. UV printed labels are supplied in strips (not on rolls).
This method is ideal for small runs (typically under 500 pieces). For larger runs, we recommend Premium Express printing or offset printing. Contact us for more information.

Offset printing (5-8 weeks) is carried out with the Offset technique, during the label production process. It offers the best print quality ever. The file for printing must be in CMYK, possibly vector.