computer science

Haystack (software)

Haystack (software) is a computer science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Haystack (software) rather than just read about it. In short: Haystack was a never-completed program intended for network traffic obfuscation and encryption. It was promoted as a tool to circumvent internet censorship in Iran.

Key takeaways

Haystack (software) belongs to computer science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Haystack (software) to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Haystack (software) from memory before moving on to harder problems.

Reference excerpt

Haystack was a never-completed program intended for network traffic obfuscation and encryption. It was promoted as a tool to circumvent internet censorship in Iran. Shortly after the release of the first test version, reviewers concluded the software did not live up to promises made about its functionality and security, and would leave its users' computers more vulnerable.

History Haystack was announced in the context of the perceived wave of Internet activism during 2009 Iranian election protests. There was a great deal of hype surrounding the Haystack project. The BBC's Virtual Revolution television series featured the software in the context of attempts to bypass network blocking software in Iran. The project was composed of one programmer and a spokesperson. Early on in the project the CRC claims to have received a manual describing Iran's filtering software, written in Persian, from an Iranian official. Amidst criticism from technologists, including Jacob Appelbaum and Danny O'Brien, on September 13, 2010, the Washington Post reported that security concerns had led to suspension of testing of Haystack. A message on the front page of the Haystack web site posted the same day confirmed the report, saying "We have halted ongoing testing of Haystack in Iran pending a security review. If you have a copy of the test program, please refrain from using it." The following day the BBC reported the same news and quoted the CRC as stating that source code to the application would be released.

Shutdown The resignation of the only programmer on the project, Daniel Colascione, effectively ended development of the Haystack project. The project web site is now defunct.

References

Worked examples

Example 1 — a first encounter with Haystack (software)

Start with the simplest possible case. Write down what Haystack (software) claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In computer science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Haystack (software) before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Haystack (software) ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Haystack (software)

In research: Haystack (software) appears in computer science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Haystack (software) in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Haystack (software) is common in secondary-school and first-year university syllabi. It links to neighbouring topics Anonymity networks, Internet in Iran, Vaporware, so understanding it makes those chapters shorter.
In everyday life: Look for Haystack (software) outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Haystack (software) in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Haystack (software) means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Haystack (software) out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Haystack (software) in simple terms?

Haystack was a never-completed program intended for network traffic obfuscation and encryption. It was promoted as a tool to circumvent internet censorship in Iran.

Why does Haystack (software) matter?

Because it connects several computer science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Haystack (software)?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Haystack (software).