Timed Physical Password or Authentication Keys.

Area of Science:

• Materials Science
• Nanotechnology
• Information Security

Background:

• Current root-of-trust technologies rely on permanent digital storage, making them vulnerable to sophisticated counterfeit attacks.
• There is a growing need for novel, non-conventional methods to create unique digital fingerprints for high-value resources.

Purpose of the Study:

• To introduce a new concept for physically storing information dynamically using nanoscale surface stress and metastable phase transitions.
• To explore the potential of this method for creating high-entropy, multi-pathway decryption systems.

Main Methods:

• Utilizing nanoscale surface stress to induce metastable phase transitions in materials.
• Engineering multilevel variables within these phase-transition-based keys.
• Investigating the controlled decay of the metastable state via external forces for a physical timer function.

Main Results:

• Demonstrated a novel pathway for physically storing information with high dimensionality and entropy.
• Showcased the potential for multilevel variables, leading to multiple decryption pathways.
• Established the feasibility of inducing a predictable decay rate for a physical timer using phase relaxation.

Conclusions:

• Phase transitions can be effectively utilized as dynamic information carriers.
• This approach offers a promising, secure alternative to conventional, permanent digital storage methods for protecting critical resources.