introduction to time travel -or- how to send your files to the future
DESCRIPTION
Introduction to digital recovery and digital preservation.TRANSCRIPT
![Page 1: Introduction to Time Travel -or- How to Send Your Files to the Future](https://reader034.vdocument.in/reader034/viewer/2022052410/55499521b4c905c26a8b585f/html5/thumbnails/1.jpg)
1
INTRODUCTION TO TIME TRAVEL
-OR-
HOW TO SEND YOUR FILES TO THE FUTURE
![Page 2: Introduction to Time Travel -or- How to Send Your Files to the Future](https://reader034.vdocument.in/reader034/viewer/2022052410/55499521b4c905c26a8b585f/html5/thumbnails/2.jpg)
2
TIME TRAVEL: A MODIFIED DEFINITION
COMMUNICATION ACROSS TIME AND SPACE
![Page 3: Introduction to Time Travel -or- How to Send Your Files to the Future](https://reader034.vdocument.in/reader034/viewer/2022052410/55499521b4c905c26a8b585f/html5/thumbnails/3.jpg)
3
A BRIEF HISTORY OF TIME TRAVEL
![Page 4: Introduction to Time Travel -or- How to Send Your Files to the Future](https://reader034.vdocument.in/reader034/viewer/2022052410/55499521b4c905c26a8b585f/html5/thumbnails/4.jpg)
RECENT ATTEMPTS AT TIME TRAVEL
![Page 5: Introduction to Time Travel -or- How to Send Your Files to the Future](https://reader034.vdocument.in/reader034/viewer/2022052410/55499521b4c905c26a8b585f/html5/thumbnails/5.jpg)
5
INFORMATION PRESERVATION
REQUIRES DIGITAL PRESERVATION
The Future!
A long time ago…
Today
Today
Analog
Digital
![Page 6: Introduction to Time Travel -or- How to Send Your Files to the Future](https://reader034.vdocument.in/reader034/viewer/2022052410/55499521b4c905c26a8b585f/html5/thumbnails/6.jpg)
6
WHAT DOES ‘DIGITAL’ ACTUALLY MEAN?
(FOR STORAGE)
![Page 7: Introduction to Time Travel -or- How to Send Your Files to the Future](https://reader034.vdocument.in/reader034/viewer/2022052410/55499521b4c905c26a8b585f/html5/thumbnails/7.jpg)
7
MAGNETIC MEDIA: HARD DRIVES
Peaks = 1sTroughs = 0s
![Page 8: Introduction to Time Travel -or- How to Send Your Files to the Future](https://reader034.vdocument.in/reader034/viewer/2022052410/55499521b4c905c26a8b585f/html5/thumbnails/8.jpg)
8
SOLID STATE MEDIA: SD CARDS
![Page 9: Introduction to Time Travel -or- How to Send Your Files to the Future](https://reader034.vdocument.in/reader034/viewer/2022052410/55499521b4c905c26a8b585f/html5/thumbnails/9.jpg)
9
OPTICAL MEDIA: CDS
![Page 10: Introduction to Time Travel -or- How to Send Your Files to the Future](https://reader034.vdocument.in/reader034/viewer/2022052410/55499521b4c905c26a8b585f/html5/thumbnails/10.jpg)
10
A QUESTION OF REPRESENTATION
“I am the wisest man alive, for I
know one thing, and that is that I know nothing.”
-Plato
00100010010010010010000001100001011011010010000001110100011010000110010100100000011101110110100101110011011001010111001101110100001000000110110101100001011011100010000001100001011011000110100101110110011001010010110000100000011001100110111101110010001000000100100100100000011010110110111001101111011101110010000001101111011011100110010100100000011101000110100001101001011011100110011100101100001000000110000101101110011001000010000001110100011010000110000101110100001000000110100101110011001000000111010001101000011000010111010000100000010010010010000001101011011011100110111101110111001000000110111001101111011101000110100001101001011011100110011100101110001000100000110100001010001011010101000001101100011000010111010001101111
= =
![Page 11: Introduction to Time Travel -or- How to Send Your Files to the Future](https://reader034.vdocument.in/reader034/viewer/2022052410/55499521b4c905c26a8b585f/html5/thumbnails/11.jpg)
11
"I am the wisest man"alive, fob I know one
thing, and that is that I onow nothing."
-Plato
“I am the wisest man alive, for I know one thing, and
that is that I know nothing.”
-Plato
BIT ROT: THE DEGRADATION OF BITS OVER TIME
3 Bits CorruptedOriginal Text
![Page 12: Introduction to Time Travel -or- How to Send Your Files to the Future](https://reader034.vdocument.in/reader034/viewer/2022052410/55499521b4c905c26a8b585f/html5/thumbnails/12.jpg)
12
BITLOSS
& DIGITALPHOTOS
Images from Melanie Willhide’s “to Adrian Rodreguez with love”http://www.vonlintel.com/Melanie-Willhide.html
![Page 13: Introduction to Time Travel -or- How to Send Your Files to the Future](https://reader034.vdocument.in/reader034/viewer/2022052410/55499521b4c905c26a8b585f/html5/thumbnails/13.jpg)
13
ALMOST LOST
NASA images from first Lunar Orbiter 1966
BBC Domesday Project 1986
![Page 14: Introduction to Time Travel -or- How to Send Your Files to the Future](https://reader034.vdocument.in/reader034/viewer/2022052410/55499521b4c905c26a8b585f/html5/thumbnails/14.jpg)
14
DOMESDAY PROJECT
![Page 15: Introduction to Time Travel -or- How to Send Your Files to the Future](https://reader034.vdocument.in/reader034/viewer/2022052410/55499521b4c905c26a8b585f/html5/thumbnails/15.jpg)
15
DIGITAL PRESERVATION STRATEGIES
1. Format Choice
2. Documentation
3. Migration
4. Emulation
5. Hashing/checksums
6. File Identification
![Page 16: Introduction to Time Travel -or- How to Send Your Files to the Future](https://reader034.vdocument.in/reader034/viewer/2022052410/55499521b4c905c26a8b585f/html5/thumbnails/16.jpg)
16
1. FORMAT CHOICE
Hardware
Software
![Page 17: Introduction to Time Travel -or- How to Send Your Files to the Future](https://reader034.vdocument.in/reader034/viewer/2022052410/55499521b4c905c26a8b585f/html5/thumbnails/17.jpg)
17
NDIIPP
http://www.digitalpreservation.gov/formats/index.shtml
![Page 18: Introduction to Time Travel -or- How to Send Your Files to the Future](https://reader034.vdocument.in/reader034/viewer/2022052410/55499521b4c905c26a8b585f/html5/thumbnails/18.jpg)
18
THE LIBRARY OF CONGRESS:DIGITAL PRESERVATION
http://www.digitalpreservation.gov/
![Page 19: Introduction to Time Travel -or- How to Send Your Files to the Future](https://reader034.vdocument.in/reader034/viewer/2022052410/55499521b4c905c26a8b585f/html5/thumbnails/19.jpg)
19
2. DOCUMENTATION & METADATA
• File Name• File Size• Number of Words• Total Editing Time• Creation Date• Last Modified• Last Printed• User Name
• File TypeWord Doc
• Software VersionMS Word 2010
![Page 20: Introduction to Time Travel -or- How to Send Your Files to the Future](https://reader034.vdocument.in/reader034/viewer/2022052410/55499521b4c905c26a8b585f/html5/thumbnails/20.jpg)
20
3. MIGRATION
• The transfer of a bit stream (the 1s and 0s) from one medium to another.
![Page 21: Introduction to Time Travel -or- How to Send Your Files to the Future](https://reader034.vdocument.in/reader034/viewer/2022052410/55499521b4c905c26a8b585f/html5/thumbnails/21.jpg)
21
FINDING THE HARDWARE
![Page 22: Introduction to Time Travel -or- How to Send Your Files to the Future](https://reader034.vdocument.in/reader034/viewer/2022052410/55499521b4c905c26a8b585f/html5/thumbnails/22.jpg)
22
MIGRATION
Similar to photocopying –including the imperfections.
Data can be lost or corrupted in the transfer.
![Page 23: Introduction to Time Travel -or- How to Send Your Files to the Future](https://reader034.vdocument.in/reader034/viewer/2022052410/55499521b4c905c26a8b585f/html5/thumbnails/23.jpg)
23
WRITE BLOCKERS
• Prevents inadvertently overwriting digital information.
• Allows ‘read’ commands to pass, blocks ‘write’ commands.
![Page 24: Introduction to Time Travel -or- How to Send Your Files to the Future](https://reader034.vdocument.in/reader034/viewer/2022052410/55499521b4c905c26a8b585f/html5/thumbnails/24.jpg)
24
4. EMULATIONCreates an environment that ‘tricks’ the software into functioning as if it was in its original computing environment.
Similar to impersonation.
![Page 25: Introduction to Time Travel -or- How to Send Your Files to the Future](https://reader034.vdocument.in/reader034/viewer/2022052410/55499521b4c905c26a8b585f/html5/thumbnails/25.jpg)
25
EMULATION & THE GAMING COMMUNITY
"The Old Version Flickers More": Digital Preservation from the User's Perspective
http://archivists.metapress.com/content/1765364485n41800/
![Page 26: Introduction to Time Travel -or- How to Send Your Files to the Future](https://reader034.vdocument.in/reader034/viewer/2022052410/55499521b4c905c26a8b585f/html5/thumbnails/26.jpg)
26
BROWSER BASED EMULATION
https://archive.org/details/historicalsoftware
![Page 27: Introduction to Time Travel -or- How to Send Your Files to the Future](https://reader034.vdocument.in/reader034/viewer/2022052410/55499521b4c905c26a8b585f/html5/thumbnails/27.jpg)
27
5. HASHING/CHECKSUMS
How they work:An algorithms ‘reads’ a digital object and, based upon the 1s and 0s that make up that object, produces a unique alpha-numeric string of characters that represent it.
What that means:Checksums are very effective tools in determining if a digital object has been corrupted (assuming you have the original checksum to compare it to).
![Page 28: Introduction to Time Travel -or- How to Send Your Files to the Future](https://reader034.vdocument.in/reader034/viewer/2022052410/55499521b4c905c26a8b585f/html5/thumbnails/28.jpg)
28
HASHING
461D5E8093B94401EAF12E442CEAB908
FD7D5993062D270F482E00BDE64D35FE
Original File
Corrupted File
MD5 Hash
![Page 29: Introduction to Time Travel -or- How to Send Your Files to the Future](https://reader034.vdocument.in/reader034/viewer/2022052410/55499521b4c905c26a8b585f/html5/thumbnails/29.jpg)
29
HASHING
http://download.cnet.com/MD5-SHA-Checksum-Utility/3000-2092_4-10911445.html
![Page 30: Introduction to Time Travel -or- How to Send Your Files to the Future](https://reader034.vdocument.in/reader034/viewer/2022052410/55499521b4c905c26a8b585f/html5/thumbnails/30.jpg)
30
HASHING IN TWO STEPS
![Page 31: Introduction to Time Travel -or- How to Send Your Files to the Future](https://reader034.vdocument.in/reader034/viewer/2022052410/55499521b4c905c26a8b585f/html5/thumbnails/31.jpg)
31
IDENTIFYING MYSTERY FILES
.hqx? .mkv? .ape?
You have to identify what a file is in order to figure out what software can render it. But how?
![Page 32: Introduction to Time Travel -or- How to Send Your Files to the Future](https://reader034.vdocument.in/reader034/viewer/2022052410/55499521b4c905c26a8b585f/html5/thumbnails/32.jpg)
32
6. FILE IDENTIFICATION
Step 1: Google the file extension
![Page 33: Introduction to Time Travel -or- How to Send Your Files to the Future](https://reader034.vdocument.in/reader034/viewer/2022052410/55499521b4c905c26a8b585f/html5/thumbnails/33.jpg)
33
IDENTIFYING MYSTERY FILES
![Page 34: Introduction to Time Travel -or- How to Send Your Files to the Future](https://reader034.vdocument.in/reader034/viewer/2022052410/55499521b4c905c26a8b585f/html5/thumbnails/34.jpg)
34
IDENTIFYING MYSTERY FILES
Step 1: Google the file extension
Step 2: If step 1 fails, use DROID
![Page 35: Introduction to Time Travel -or- How to Send Your Files to the Future](https://reader034.vdocument.in/reader034/viewer/2022052410/55499521b4c905c26a8b585f/html5/thumbnails/35.jpg)
35
Digital Record Object Identification
http://www.nationalarchives.gov.uk/information-management/our-services/dc-file-profiling-tool.htm
![Page 36: Introduction to Time Travel -or- How to Send Your Files to the Future](https://reader034.vdocument.in/reader034/viewer/2022052410/55499521b4c905c26a8b585f/html5/thumbnails/36.jpg)
36
IDENTIFYING MYSTERY FILES
Step 1: Google the file extension
Step 2: If step 1 fails, use DROID
Step 3: If step 2 fails, open it in a hex editor
![Page 37: Introduction to Time Travel -or- How to Send Your Files to the Future](https://reader034.vdocument.in/reader034/viewer/2022052410/55499521b4c905c26a8b585f/html5/thumbnails/37.jpg)
37
HXD HEX EDITOR
http://download.cnet.com/HxD-Hex-Editor/3000-2352_4-10891068.html
![Page 38: Introduction to Time Travel -or- How to Send Your Files to the Future](https://reader034.vdocument.in/reader034/viewer/2022052410/55499521b4c905c26a8b585f/html5/thumbnails/38.jpg)
38
HEX EDITOR VIEW
![Page 39: Introduction to Time Travel -or- How to Send Your Files to the Future](https://reader034.vdocument.in/reader034/viewer/2022052410/55499521b4c905c26a8b585f/html5/thumbnails/39.jpg)
39
FILE SIGNATURES/MAGIC NUMBERS
• Every file type has a digital ‘finger print’ near the beginning of its code, sometimes called a ‘signature’ or ‘magic number’.
• In a hex editor, you can read the hexadecimal notation of the file and identify its magic number, then look up that number to identify the file type.
![Page 40: Introduction to Time Travel -or- How to Send Your Files to the Future](https://reader034.vdocument.in/reader034/viewer/2022052410/55499521b4c905c26a8b585f/html5/thumbnails/40.jpg)
40
WIKIPEDIA’S FILE SIGNATURE LIST
http://en.wikipedia.org/wiki/List_of_file_signatures
![Page 41: Introduction to Time Travel -or- How to Send Your Files to the Future](https://reader034.vdocument.in/reader034/viewer/2022052410/55499521b4c905c26a8b585f/html5/thumbnails/41.jpg)
41
IF YOU HAVE QUESTIONS ABOUT DIGITAL PRESERVATION
THE LIBRARY IS HERE TO HELP
![Page 42: Introduction to Time Travel -or- How to Send Your Files to the Future](https://reader034.vdocument.in/reader034/viewer/2022052410/55499521b4c905c26a8b585f/html5/thumbnails/42.jpg)
42
Shea SwaugerData Management Librarian
Morgan Library, [email protected]
Questions?
This presentation is available at http://www.slideshare.net/SheaSwauger