Cryptography | Stanford Online

Cryptography is an indispensable tool for protecting information in computer systems. This course explains the inner workings of cryptographic primitives and how to correctly use them. Students will learn how to reason about the security of cryptographic constructions and how to apply this knowledge to real-world applications. The course begins with a detailed discussion of how two parties who have a shared secret key can communicate securely when a powerful adversary eavesdrops and tampers with traffic. We will examine many deployed protocols and analyze mistakes in existing systems. The second half of the course discusses public-key techniques that let two or more parties generate a shared secret key. We will cover the relevant number theory and discuss public-key encryption, digital signatures, and authentication protocols. Towards the end of the course we will cover more advanced topics such as zero-knowledge, distributed protocols such as secure auctions, and a number of privacy mechanisms. Throughout the course students will be exposed to many exciting open problems in the field.

The course will include written homeworks and programming labs. The course is self-contained, however it will be helpful to have a basic understanding of discrete probability theory.

Yes. Students who successfully complete the class will receive a statement of accomplishment signed by the instructor.

The class will consist of lecture videos, which are broken into small chunks, usually between eight and twelve minutes each. Some of these may contain integrated quiz questions. There will also be standalone quizzes that are not part of video lectures, and programming assignments. There will be approximately two hours worth of video content per week.

The course includes programming assignments and some programming background will be helpful. However, we will hand out lots of starter code that will help students complete the assignments. We will also point to online resources that can help students find the necessary background.

The course is mostly self contained, however some knowledge of discrete probability will be helpful. Thewikibooks articleon discrete probability should give sufficient background.

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Cryptography | Stanford Online

Cryptocurrency Round-Up: PayPal Founder Sceptical of Bitcoin and Bitnet Receives $14.5m Funding

Bitcoin and other major cryptocurrency markets remain stable, as Bitnet secures Series A funding.(IBTimes UK)

The price of bitcoin has remained relatively stable over the past 24 hours, shifting by less than 1% in value since yesterday.

Most other major cryptocurrencies have followed in bitcoin's lead, with litecoin, dogecoin and peercoin all moving by between 0% and 2%.

The biggest mover across all digital currency markets is uro, the "hybrid commodity token" that pegs its value to the fertilizer urea. Uro's price jumped by 45% to take its market capitalisation up above $1.5 million for the first time since July.

The co-founder of PayPal, Peter Thiel has said that despite bitcoin being founded on the same set of ideas as PayPal, the two have developed in very different directions.

"Bitcoin is the opposite of PayPal, in the sense that it actually succeeded in creating a currency," Thiel said in a talk at the Booth School of Business in Illinois.

"However, its payment system is lacking, and it is often used to make illegal transactions, such as to buy heroin. Until bitcoin is used to make more legal transactions, I am a bit sceptical."

Thiel has previously described bitcoin as "badly lacking", saying in a Reddit AMA (ask me anything) last month that he would become "more bullish" on bitcoin when the payment volume of bitcoin significantly increases.

Bitnet secures $14.5m Series A funding

Bitcoin payments processor Bitnet has raised $14.5m in a Series A funding round that it hopes will go some way to enticing major merchants into using its payments software.

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Cryptocurrency Round-Up: PayPal Founder Sceptical of Bitcoin and Bitnet Receives $14.5m Funding

Julian Assange: ‘I hope there’s much still to come’

The Wikileaks co-founder says the internet can be both a tool of political empowerment and the road to dystopia

How do you think people's view of powerful tech companies like Google has changed since Edward Snowden leaked the National Security Agency documents? People seeing Google's colourful, playful, childish logo billions of times per day creates a sense that the company is harmless and just a service like turning on the tap and getting some water. It is as if it doesn't exist as a political or corporate entity.

When it was revealed that Google was extensively cooperating with the NSA through the PRISM system a bit of the gloss came off. But Google and other Silicon Valley companies like Facebook pivoted after a lot of outrage from their users and tried to separate themselves from the NSA. They made it seem like it was something they were coerced into.

What about Google's motto of "Don't be Evil"? It's not that I want people to see Google as an evil company run by evil people. It's simply the nature of Google's business to collect as much information about as many people as possible, to store that information, index it, create a profile of each person, predict their interests and sell those profiles to advertisers and others. And that is exactly the same industry, at an engineering level, that the NSA is involved in. Collecting information about people, storing it, indexing it, making predictive profiles about people and then "selling" it to other US government agencies. Given that Google and the NSA are in fundamentally the same business, the NSA has of course piggybacked on Google and extracted information from it. It's so attractive to the NSA that it will continue forever, one way or another.

What frightens you about the future? There are clear dystopian trends underway. If you read a book like 1984 now, it seems quaint. Its form of surveillance seems tame. But the internet does two things: it centralises power because it connects everywhere in the world to what are already the centres of power, but it also permits the greatest worldwide political education that has ever occurred. It's not at all clear which one of these will dominate. It's important to try and shift things in the right direction. The dystopian scenario which we're at least in part heading towards is very severe indeed.

Is the internet broken? It needs to be re-engineered. Most of the technology used on the internet now is about 15 to 30 years old. It's been around for long enough for major power factions to adapt to it and to work out how to exploit and control it. Bitcoin's block chain the publicly distributed digital ledger that records all transactions on the Bitcoin network is the most intellectually interesting development in the last five years, though not for the reasons most people think.

At its core the block chain provides global proof of publishing at a certain time. That means that once something is in the block chain it identifies precisely what moment in history it occurred and can't be undone. This breaks Orwell's dictum that he who controls the past controls the future and who controls the present controls the past.

Looking back, is there anything that you would have done differently with WikiLeaks? Many little things. Of course, if you can't say that after a big project, you're not learning. But not many major ones, given the resource constraints. If you're under banking blockades or house arrest, worldwide manhunts and people defining members of staff as enemy combatants that can be kidnapped or assassinated at will, it does limit some of the things that you might otherwise have been able to do.

Do you feel the main work has been accomplished? I hope there's much still to come. But we have some important accomplishments under our belt. Contributing to the shift in the internet from quite a barren, uneducated and apolitical space five years ago to a political space where young people feel they can take part in history is possibly the most significant development.

Julian Assange is co-founder of Wikileaks, the website that famously leaked sensitive US military and diplomatic documents in 2010. Since June 2012 he has been living in the Ecuadorean embassy in London, where he sought asylum after facing potential extradition to Sweden over allegations of sexual assault. He has just written a new book, When Google Met WikiLeaks (OR Books)

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Julian Assange: 'I hope there's much still to come'

Edward Snowden Pt.1: The Final Check on Abuse of Power is Whistle-blowing–The New Yorker Festival – Video


Edward Snowden Pt.1: The Final Check on Abuse of Power is Whistle-blowingThe New Yorker Festival
Edward Snowden joins New Yorker staff writer Jane Mayer in a virtual interview to discuss Internet-privacy violations and what he believes his legacy will ultimately be. Watch The New Yorker...

By: The New Yorker

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Edward Snowden Pt.1: The Final Check on Abuse of Power is Whistle-blowing–The New Yorker Festival - Video

‘Citizenfour’ Review: Jeremy Gerard On Edward Snowden Documentary – Video


#39;Citizenfour #39; Review: Jeremy Gerard On Edward Snowden Documentary
Watch my video review of Citizenfour, the chilling documentary by Laura Poitras that puts a human face to Edward Snowden, the former NSA contractor who leaked tens of thousands of pages of...

By: Deadline Hollywood

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'Citizenfour' Review: Jeremy Gerard On Edward Snowden Documentary - Video