Welcome to Mike's Toolbox

Mathematics and Finance

Math is by far your most important tool in the quest for success in your career and in life. Here are some quick tutorials on select topics that will improve your grasp of everyday math and finance:

Percentages
Interest
Mortgages (Loans)
Treasury Bonds
Logarithms
Advanced Logarithms
Sum of Powers of a Number
Taxes   See how lower tax rates would be all the stimulus we need!

Calculators

Pop-up Scientific Calculator   Calculator Help
Pop-up Mortgage Calculator

Embed a calculator on your own page

Transport Layer Security

TLS, formerly known as Secure Socket Layer (SSL), is the technology that keeps the Internet secure. If you are developing TLS client software, you can verify that it works correctly by connecting to my test server:

https://www.mikestoolbox.net
SSL version 3, TLS versions 1.0, 1.1, and 1.2.
1024-bit Diffie-Hellman parameters.
Asks for a client certificate.

https://www.mikestoolbox.org
SSL version 3, TLS versions 1.0, 1.1, and 1.2.
1536-bit Diffie-Hellman parameters.

Extensions supported by both servers:

Server Name Indication   RFC 4366
Maximum Fragment Length RFC 4366
Truncated HMAC RFC 4366
Signature Algorithms RFC 5246
Session Tickets RFC 5077
Renegotiation Info RFC 5746

Note: you will get security warnings if you connect with a normal browser since the server uses its own root certificate.

Contacting Mike of Mike's Toolbox

Please send comments and suggestions to:  mikestoolbox@pobox.com