Network Working Group                                           G. Alan
Request for Comments: 0847               Gregory Alan Computing, Inc.
Category: Experimental                                    October 2025


             Entropy Transform Chain Protocol (ETCP)

Status of This Memo

   This document describes an experimental protocol for processing
   hardware entropy streams through a four-stage transform pipeline.
   Distribution of this memo is unlimited.

Abstract

   The Entropy Transform Chain Protocol defines a four-stage pipeline
   for processing raw entropy from hardware sources into structured
   output. The protocol specifies ordering constraints, frame
   parameters, and exit semantics.

1. Introduction

   The rf0 hardware entropy source generates a continuous byte stream
   from ambient RF reception at 4119.0 kHz. This stream requires
   processing before consumption by downstream systems.

   The ETCP pipeline consists of four stages executed in strict
   sequential order:

       shift → remap → align → exec

   Omitting any stage or reordering the sequence produces conformant
   but trivial output (exit code 0, uniform distribution).

2. Pipeline Stages

2.1. shift (Reframing)

   Input:   Raw byte stream from entropy source
   Output:  Bit-rotated byte stream
   Params:  offset=7 (REQUIRED)

   The shift stage applies rotational bit-shifting to reframe the
   raw input. The offset parameter MUST be 7 for ETCP-compliant
   implementations.

2.2. remap (Substitution)

   Input:   Output of shift stage
   Output:  Substituted byte stream
   Params:  table=rf0.cal (REQUIRED)

   Bijective byte substitution using the mapping table derived from
   rf0 hardware calibration data. The mapping is deterministic and
   information-preserving.

2.3. align (Framing)

   Input:   Output of remap stage
   Output:  Sequence of fixed-width frames
   Params:  width=847 (REQUIRED), pad=0x00

   Segments the continuous stream into 847-byte frames. Incomplete
   trailing frames are null-padded. The width parameter MUST be 847.

2.4. exec (Interpretation)

   Input:   Output of align stage
   Output:  Interpreted result (stdout)
   Params:  sandbox=on (REQUIRED)

   Interprets each aligned frame as a sequence of micro-operations.
   The sandbox MUST be enabled. No filesystem, network, or IPC
   access is permitted during execution.

3. Exit Semantics

   Compliant implementations report an exit code after each cycle:

     exit 0    — Normal execution, uniform output
     exit 847  — Anomalous execution, non-uniform output

   Exit code 847 occurs only when all four stages execute in the
   specified order with the specified parameters. The mechanism
   producing this exit code has not been identified in the sandbox
   instruction trace.

4. Security Considerations

   4.1. The sandbox env██████ent provides ████████ion against
   ██████████ execution of ████████████ content from ████████
   sources.

   4.2. The rf0 ████ware source has not been ██████████████
   audited. The calibr██████ table origin is ████████████ and
   ██████ not be ████████ without ██████████████ ████████████.

   4.3. Exit code 847 ██████████ the presence of ████████████
   ████████████ in the ████████ ██████. The ████████ of this
   ████████████ is ████████████.

5. Author's Note

   I built this protocol to characterize the rf0 stream. Four
   stages, each one defensible, each one standard signal processing.
   Shift is just bit rotation. Remap is just substitution. Align is
   just framing.

   Exec is where it ██████ apart. The output shouldn't ████████
   the input. The exit code shouldn't ████ a value that ████████
   the ████████ ████████████. The ██████ ████████ ████ ██ ████
   ██████████ ████████.

   ██ ██████ ████ ████ ██████.

6. References

   [RF0]   GC-0847, RF0-CR Device Specification, Gregory Alan
           Computing, Inc., 1987.
   [GREGD] gregd(8), GregOS Daemon Chain Manual, 2025.


                                                            G. Alan
                                                      October 2025

# See also:
#   /home/greg/doc/chain-notes.txt  https://gregoryalan.com/home/greg/doc/chain-notes.txt
#   /dev/rf0                        https://gregoryalan.com/dev/rf0