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January, 2005
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Fabulous Adventures In Coding
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January, 2005
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Fabulous Adventures In Coding
You Want Salt With That? Part Two: We Need A Hash
Posted
over 7 years ago
by
Eric Lippert
22
Comments
OK, we want to sketch out an authentication system which is sufficiently secure against common attacks even if all the details of the system are known to the attacker. Let's start with a simple system, take a look at what its vulnerabilities are, and...
Fabulous Adventures In Coding
You Want Salt With That? Part One: Security vs Obscurity
Posted
over 7 years ago
by
Eric Lippert
10
Comments
A poster to one of the Joel On Software fora the other day asked what a "salt" was (in the cryptographic sense, not the chemical sense!) and why it's OK to make salts public knowledge. I thought I might talk about that a bit over the next few entries...
Fabulous Adventures In Coding
Fun With Floating Point Arithmetic, Part Six
Posted
over 7 years ago
by
Eric Lippert
4
Comments
One more thing -- I said earlier that the VBScript float-to-string algorithm was a little bit different than the JScript algorithm. We can demonstrate quite easily by comparing the outputs of two nigh-identical programs: ' VBScript print 9.2 * 100.0 <...
Fabulous Adventures In Coding
That's a Big Transistor
Posted
over 7 years ago
by
Eric Lippert
24
Comments
Here's some fun for a Friday. A few years back a bunch of my coworkers and I got to discussing the space program over lunch. Someone asked why it is that we continue to launch devices into orbit by strapping a big old tank full of liquid oxygen to the...
Fabulous Adventures In Coding
Fun with Floating Point Arithmetic, Part Five
Posted
over 7 years ago
by
Eric Lippert
11
Comments
I went to Joel Spolsky's geek dinner at Crossroads the other night, which was a lot of fun. I didn't get much of a chance to chat with Joel, as he was surrounded by a cadre of adoring fans three deep the whole time. I mostly hung out with KC and Larry...
Fabulous Adventures In Coding
Fun with Floating Point Arithmetic, Part Four
Posted
over 7 years ago
by
Eric Lippert
7
Comments
A reader also asked the other day why it is that in VBScript, CSng(0.1) = CDbl(0.1) is False . Forget about binary floating point for a moment. Suppose that we had two fixed-point decimal systems, say one with five digits after the decimal place and one...
Fabulous Adventures In Coding
Fun With Floating Point Arithmetic, Part Three
Posted
over 7 years ago
by
Eric Lippert
4
Comments
I've been getting lots of mail, questions and pointers to interesting articles on some of the trials and tribulations of using floating point arithmetic correctly. Please do keep it coming! Though I am certainly no expert in this area, I'm happy to take...
Fabulous Adventures In Coding
Straight from the source
Posted
over 7 years ago
by
Eric Lippert
7
Comments
One of the truly great things about working here is that Distinguished Engineers take time out of their busy schedules to answer random questions . Many thanks to Anders and Scott for sharing their insights. Incidentally, as I've mentioned before , I...
Fabulous Adventures In Coding
Floating Point And Benford's Law, Part Two
Posted
over 7 years ago
by
Eric Lippert
7
Comments
A number of readers asked for an explanation of my offhand comment that Benford's Law can be used to show that binary is the best base for doing floating point math. One of the desired properties of a floating point system is that the "representation...
Fabulous Adventures In Coding
Benford's Law
Posted
over 7 years ago
by
Eric Lippert
27
Comments
While I was poking through my old numeric analysis textbooks to refresh my memory for this series on floating point arithmetic, I came across one of my favourite weird facts about math. A nonzero base-ten integer starts with some digit other than zero...
Fabulous Adventures In Coding
Still Scratching The Surface
Posted
over 7 years ago
by
Eric Lippert
0
Comments
I was pleased to learn earlier today that Scott Wiltamuth, one of the designers of C#, has started blogging . I'm looking forward to seeing what Scott has to say about the past, present, and future of language design for .NET. I first encountered Scott...
Fabulous Adventures In Coding
Floating Point Arithmetic, Part One
Posted
over 7 years ago
by
Eric Lippert
18
Comments
A month ago I was discussing some of the issues in integer arithmetic , and I said that issues in floating point arithmetic were a good subject for another day. Over the weekend I got some questions from a reader about floating point arithmetic, so this...
Fabulous Adventures In Coding
Riddle Me This, Google, Part Three
Posted
over 7 years ago
by
Eric Lippert
29
Comments
Happy New Year everyone! Let's start 2005 off with another episode of Riddle Me This, Google. Yes, once more, I've looked through the 43500 google queries that have resulted in page hits on my blog in the last six months. (Over 200 a day!) For most...
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