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9.4 Cryptographic Foundations

PTERI relies only on well-established cryptographic primitives.

There are no experimental algorithms.

Key Generation & Signing​

  • Elliptic Curve Cryptography (secp256k1)
  • Hardware-backed key storage where available
  • Keys are generated locally on the device
  • Private keys are non-exportable

Challenge–Response Authentication​

  • Cryptographically random nonces
  • Explicit expiration windows
  • Single-use enforcement
  • Deterministic verification

Transaction Verification​

  • Litecoin proof-of-work consensus
  • UTXO-based validation
  • Optional MWEB privacy guarantees
  • Public, independently verifiable settlement

Hashing & Integrity​

  • Cryptographic hash functions for message integrity
  • Signed payloads are tamper-evident
  • Any modification invalidates verification