Title: Storing information on paper using the Pen To Paper protocol

	Title: Storing information on paper using the Pen To Paper protocol
	Author: Solène
	Date: 15 July 2022
	Tags: life fun nocloud
	Description: This article is about describing the process of storing
	and extracting information on paper using a pen.

	# Introduction

	Here is a draft for a protocol named PTPDT, an acronym standing for Pen
	To Paper Data Transfer. It comes with its companion specification
	Paper To Brain.

	The protocol describes how a pen can be used to write data on a sheet
	of paper. Maybe it would be better named as Brain To Paper Protocol.

	# Terminology

	Some words refer to specific concepts:
	* pen: a pen or pencil
	* paper: material on which pen can be used
	* writer: the author when using the pen
	* reader: the author when reading the paper
	* anoreader: anonymous reader reading the paper

	# Model

	The writer uses a pen on a paper in order to duplicate information from
	his memories into the paper.

	We won't go into technical implementation details about how the pen
	does transmit information into the paper, we will admit some ink or
	equivalent is used in the process without altering data.

	# Nomenclature

	When storing data with this protocol, paper should be incrementally
	numbered for ordered information that wouldn't fit on a single storage
	paper unit. The reader could then read the papers in the correct order
	by following the numbering.

	It is advised to add markers before and after the data to delimit its
	boundaries. Such mechanism can increase reliability of extracting data
	from paper, or help to recover from mixed up papers.

	# Encoding

	It is recommended to use a single encoding, often known as language,
	for a single piece of paper. Abstract art is considered a blob, and
	hence doesn't have any encoding.

	# Extracting data

	There are three ways to extract data from paper:
	1. lossless: all the information is extracted and can be used and
	replicated by the reader
	2. lossy: all the information is extracted and could be used by the
	reader
	3. partial: some pieces of information are extracted with no guarantee
	it can be replicated or used

	In order to retrieve data from paper, reader and anoreader must use
	their eyesight to pass the paper data to their brain which will decode
	the information and store it internally. If reader's brain doesn't
	know the encoding, the data could be lossy or partially extracted.

	It's often required to make multiple read passes to achieve a lossless
	extraction.

	# Compression

	There are different compression algorithms to increase the pen output
	bandwidth, the reader and anoreader must be aware of the compression
	algorithm used.

	# Encryption

	The protocol doesn't enforce encryption. The writer can encrypt data
	on paper so anoreader won't be able to read this, however this will
	increase the mental charge for both the writer and the reader.

	# Accessibility

	This protocol requires the writer to be able to use a pen.

	This protocol requires the reader and anoreader to be able to see. We
	need to publish Braille To Paper Data Transfer for an accessible
	alternative.