nancryption 0.1.0

Pack float32 payloads into quiet NaN float64 values

nancryption

nancryption encodes float32 values into float64 quiet-NaN bit patterns and decodes them back again. This is useful when you need to smuggle a 32-bit payload through a float64-only path while still tagging values as NaN.

Install

uv sync

Quick Start

import numpy as np
from nancryption import nancrypt, nandecrypt

payload = np.array([1.0, -2.5, np.pi], dtype=np.float32)
encoded = nancrypt(payload)
decoded = nandecrypt(encoded)

print(encoded.dtype)  # float64
print(np.isnan(encoded).all()) # True
print(np.array_equal(decoded, payload)) # True

API

• nancrypt(a: np.ndarray) -> np.ndarray Encodes float32 payload bits into float64 quiet NaN values.
• nandecrypt(arr: np.ndarray) -> np.ndarray Recovers the embedded float32 payload from encoded float64 values.

Development

Run tests:

uv run pytest