Hexadecimal data encryption in paranemic crossover (PX) DNA

Area of Science:

• Biotechnology
• Molecular Biology
• Data Storage

Background:

• DNA's inherent programmability and efficiency for information encoding.
• Limitations of current data storage methods.
• Potential of DNA-based data storage solutions.

Purpose of the Study:

• To develop a secure and stable DNA data storage system using paranemic crossover (PX) structures.
• To demonstrate the encryption and retrieval of binary-encoded data using PX and anti-PX motifs.
• To assess the stability and nuclease resistance of the encoded DNA structures.

Main Methods:

• Design of complementary PX and anti-PX DNA structures.
• Programming encoding elements within the DNA strands for data writing.
• Temperature-triggered reassociation of PX and anti-PX motifs for data decryption.
• Electrophoretic readout for data retrieval.
• Stability testing at various temperatures (20°C, 37°C) and outdoor conditions.
• Nuclease resistance assays.

Main Results:

• Successful implementation of a binary-encoded system using PX DNA structures.
• Demonstration of data encryption and decryption triggered by specific temperatures.
• Encoded information remained stable for several days under different storage conditions.
• Encrypted DNA structures exhibited enhanced resistance to nucleases compared to decrypted structures.
• Hexadecimal encoding demonstrated, including encryption of words and color codes.

Conclusions:

• The developed PX DNA-based system offers a secure and stable method for data storage.
• The system's temperature-triggered decryption and nuclease resistance are key advantages.
• Potential applications include secure messaging, barcoding, and authentication.