Apparatuses and methods for implementing digital ledgers via phase change materials

A digital ledger, comprising:

• a first plurality of enclosures;
• a second plurality of enclosures;
• a first plurality of particles disposed at first locations of the first plurality of enclosures;
• a second plurality of particles disposed at second locations of the second plurality of enclosures, wherein each of the first plurality of particles at a corresponding first location of a corresponding enclosure generate a first response that is different than a second response generated by each of the second plurality of particles at a corresponding second location of a corresponding enclosure;
• and
• a plurality of sensors configured to measure a plurality of signals generated by the first plurality of particles at the first locations of the first plurality of enclosures and the second plurality of particles at the second locations of the second plurality of enclosures, wherein the plurality of signals is used to identify the digital ledger.

A digital ledger, comprising:

• a support substrate;
• a plurality of enclosures arranged into an array on the support substrate;
• a plurality of phase change materials each disposed in a corresponding enclosure of the plurality of enclosures, wherein at least a first phase transition temperature of a first phase change material of the plurality of phase change materials is different than a second phase transition temperature of a second phase change material of the plurality of phase change materials;
• a plurality of magnetic particles disposed throughout a portion of the plurality of enclosures to spatially form a pattern across the array;
• a plurality of sensors configured to measure a plurality of signals generated by the plurality of magnetic particles;
• and
• a sensor substrate configured to:
• detect the pattern based on the plurality of signals, and
• generate one or more of an encryption key or a decryption key based on the pattern.