John Savard's Home Page

[Cryptography] [Map Projections] [All Other Topics] [Latest Additions] [Featured Topics]

The Slide Rule
Infinity
Special Relativity
Archimedean Solids
The Fourth Dimension
Two Famous Equations
Introduction to HTML
The Mandelbrot Function
Diophantus at the Printer's Shop
Tilings
Heptagonal Tilings
A Martian Calendar
A Space Habitat Design
The Equation of Time
Telescopes and Eyepieces:
What Computers Are Made From
Computer Floating-Point Formats
Computer Instruction Formats
A Computer Architecture
The Perfect Computer?
Computer Keyboards
Keyboard Scan Codes
About a Computer Language
The Punched Card
Print Train Trivia
Printing Terminals and Proportional Spacing
Digital Magnetic Tape Recording
Signal Flag Systems
The Vocalization of Hebrew
Movie and TV Aspect Ratios
A Limitation of Color Photography
Color Filter Array Designs
Unit Conversions
Comments on Wei Ch'i (or Go, or Baduk)
Don't Touch That Dial!
Color Television Madness

This web site features an extensive section concerning cryptography:

A Cryptographic Compendium

And here is a direct link to its index page.

Search this site:

Custom Search

Originally, I had among the pages on other topics, a single page about a map projection of my own. Now, having once again written, this time to run on a PC, a program to draw maps in a variety of projections, this site now also contains:

Map Projections

an extensive series of pages describing several map projections and how to construct them.

Note that there are some other topics addressed within the section on cryptography as well. Error-Correcting Codes have a page, and the section on teletypewriter ciphers illustrates many codes used with teletypewriters; more on this topic is at a page within the section on data compression. Particularly intriguing may be the proposal for representing a large repertoire of characters within 5-level code.

To view a wide range of other topics, go to the

Main Menu

from where you can go directly to pages about unit conversions, color filter array designs, signal flag systems, the musical scale, telescopes and eyepieces, pentagonal tilings, the slide rule, infinity, Archimedean solids, The Greatest Modern Board Game of Skill, computer keyboards, computer front panels, and many other topics.

For quicker loading, the section on Featured Images which addresses a number of topics for which I have created drawings, but not a full page concerning the topic as yet, has been taken off the main page. It includes an image showing the purported relation of pi and the golden ratio to the Great Pyramid, and a new item, showing a solid with both faces having octagonal symmetry and faces having pentagonal symmetry.

[Mathematics] [Science] [Computers] [Chess] [Board Games Other Than Chess] [Calendars] [A Computer Architecture] [Miscellaneous]
The submenus above may be incomplete or out of date.

Contact Information and Notes

Privacy Notice

These pages now include advertisements. These advertisements make use of a cookie to serve advertisements based on your interests. You may disable this by visiting this web page.

Needless to say, any trademarks referenced are the property of their respective owners, and are used here only for purposes of identification.

As this series of web pages contains some ideas and speculations about how to design and implement ciphers, readers are notified that I am not engaging in providing professional advice in these pages, and are advised to seek the direct advice of a competent professional before embarking on projects using cryptography.

Also, inventions or algorithms described on these pages may be covered by patents other than those directly noted.

This site is not approved by, sponsored by or affiliated with either Studio Foglio LLC, Airship Entertainment, Phil and Kaja Foglio, or any other present or future assignee of the rights to the creative works of Phil and Kaja Foglio.

Girl Genius is a registered trademark of Studio Foglio LLC. Agatha Heterodyne, Moxana, and the Silverodeon and all Girl Genius art, characters, design elements, logos, and related indicia are trademarks of, and copyrighted by, Studio Foglio LLC. The link banner above, containing items among those listed, is used by permission.

The term QUADIBLOC is the designation of a family of block ciphers described on these web pages; the description of these block ciphers, and a claim of trademark rights to the term QUADIBLOC is to be found on this page.

Here are some eggs and hatchlings that need your help! And just by looking at this page, you have helped them!

Dragon Cave is copyright T. J. Lipscomb and Techno Dev.

Dragon, Hatchling, and Egg artwork is copyright by the respective artists; further information may be obtained at the Dragon Cave site.

The eggs or hatchlings shown above are presented by the Eggs Around the World site, which assists people in obtaining additional views for their eggs or hatchlings if they are encountering difficulties in obtaining sufficient views in the time required, for whatever reason, by including references to their dragons in the signatures of forum posts or on their websites and so on.