Introduction to Cryptography - Caesar Cipher
This is my short intoduction to the caesar cipher for middle to high school students.

By: Brian Veitch

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Introduction to Cryptography - Caesar Cipher - Video

[Lec-1] Introduction to Modern Cryptography
The lecture introduces you with modern cryptography and its need. It will serve as base for the upcoming lectures. Thanks to Prof. Kannan @ IIIT-Hyderabad.

By: Cryptography deciphered

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[Lec-1] Introduction to Modern Cryptography - Video

Cryptography,who is Alice and Bob in cryptography
Alice bob in public key cryptography in key exchange in public key algorithms Diffie Helman.

By: Zariga Tongy

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Cryptography,who is Alice and Bob in cryptography - Video

Introduction to Cryptography 2 - Keyword Cipher
This is the 2nd video in cryptography following the caesar cipher. It covers a simple substituion cipher called the Keyword Cipher.

By: Brian Veitch

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Introduction to Cryptography 2 - Keyword Cipher - Video

Dorian S. Nakamoto listens during an interview with the Associated Press on March 6, in Los Angeles.

Image: Damian Dovarganes/Associated Press

By Lorenzo Franceschi-Bicchierai2014-03-17 13:13:25 UTC

Dorian Nakamoto, the man Newsweek claims is the creator of the digital cryptocurrency Bitcoin, denied being the mysterious Satoshi Nakamoto once again.

In a statement issued on Monday by his newly hired lawyer, Ethan Kirschner, Nakamoto said he "did not create, invent or otherwise work on Bitcoin." The 64-year-old went one step further than his previous denial, adding that he doesn't know anything about cryptography, something experts believe he would have needed to create Bitcoin.

"I have no knowledge of nor have I ever worked on cryptography, peer to peer systems, or alternative currencies," Nakamoto wrote in the statement, first reported by The Los Angeles Times.

Cryptography experts like Ed Felten, a professor of computer science at Princeton University, have doubted the Newsweek report on the grounds that the article doesn't prove, or even allege, that Dorian Nakamoto has any background in cryptography.

"The real Satoshi was obviously conversant with crypto the Bitcoin design shows it, and the fluency of the crypto discussion in the paper tells us that Satoshi was well acquainted with the jargon and literature of the field," Felten wrote in a blog post on March 11. "Newsweek doesnt offer any evidence that Dorian knew crypto."

In the statement, Nakamoto again claimed he first heard of the word Bitcoin when his son called him in mid-February, after talking to a reporter. Nakamoto clarified that he "never consented to speak with the reporter" when Newsweek's Leah McGrath Goodman confronted him in front of his house. That's when Nakamoto uttered the key quote in Newsweek's story: "I am no longer involved in that and I cannot discuss it."

Nakamoto even added that he can't even afford to pay for his Internet connection, which he discontinued in 2013 "due to severe financial distress."

The rest is here:
Dorian Nakamoto: I'm Not Satoshi, I Don't Know Cryptography

Dorian Satoshi Nakamoto, the man identified by Newsweek as the creator of Bitcoin, issued a statement today saying the "false report" has harmed his job prospects and created stress for him and his family.

"I did not create, invent or otherwise work on Bitcoin. I unconditionally deny the Newsweek report," his statement read.

The cryptocurrency Bitcoin was introduced in 2009 by a person calling himself Satoshi Nakamoto, but the man profiled by Newsweek says the magazine got the wrong guy. His statement today was reported by news outlets including the Los Angeles Times and was posted in full on Twitter by Reuters reporter Felix Salmon. The statement was provided to media by Nakamoto's lawyer, Ethan Kirschner.

"The first time I heard the term 'bitcoin' was from my son in mid-February 2014," the statement says. "After being contacted by a reporter, my son called me and used the word, which I had never before heard. Shortly thereafter, the reporter confronted me at my home. I called the police. I never consented to speak with the reporter. In an ensuing discussion with a reporter from the Associated Press, I called the technology 'bitcom.' I was still unfamiliar with the term."

Nakamoto went on to write that his background is in engineering, that he knows how to program, and that his most recent job was as an electrical engineer troubleshooting air traffic control equipment for the Federal Aviation Administration. But his knowledge wouldn't have been sufficient to create Bitcoin, he wrote. "I have no knowledge of nor have I ever worked on cryptography, peer to peer systems, or alternative currencies."

Nakamoto's career stalled and he's having trouble getting work because of health problems and the Newsweek article, the statement said.

"I have not been able to find steady work as an engineer or programmer for ten years," he wrote. "I have worked as a laborer, polltaker, and substitute teacher. I discontinued my Internet service in 2013 due to severe financial distress. I am trying to recover from prostate surgery in October 2012 and a stroke I suffered in October of 2013. My prospects for gainful employment [have] been harmed because of Newsweek's article."

Finally, Nakamoto wrote that the report "has been the source of a great deal of confusion and stress for myself, my 93-year-old mother, my siblings, and their families... I have retained legal counsel. This will be our last public statement on the matter. I ask that you now respect our privacy."

Nakamoto previously denied inventing Bitcoin the same day Newsweek's story came out. The Newsweek article relied on a quote in which Nakamoto said he was "no longer involved in that." Newsweek said that he was referring to Bitcoin. Nakamoto told an Associated Press reporter that he was referring to engineering in general rather than a specific project.

Newsweek today said it would not comment. "Newsweek has not received any statement or letter from either Mr. Nakamoto or his legal counsel," the publication said on its website. "If and when we do, we will respond as necessary."

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Dorian Nakamoto denies any knowledge of Bitcoin or cryptography

THE MAN ACCUSED by Newsweek of creating the Bitcoin digital currency is still disputing that and has a newly appointed lawyer to deal with any questions on the subject.

Doriani Nakamoto was 'unmasked' by Newsweek as the elusive Bitcoin creator in a report that came to be much criticised.

Almost as soon as it was published people doubted the tale, and its subject, Dorian Nakamoto, disputed it, claiming that none of it was true.

In a statement released through his lawyer he said that he is not Satoshi Nakamoto, and is not an expert in cryptography.

The first time I heard the term 'Bitcoin' was from my son in mid-February 2014. After being contacted by a reporter, my son called me and used the word, which I had never heard before," he said.

"Shortly thereafter, the reporter confronted me at my home. I called the police. I never consented to speak with the reporter. In an ensuing discussion with a reporter from the Associated Press, I called the technology 'Bitcom'. I was still unfamiliar with the term."

Doriani Nakamoto said that the 'false report' has caused stress and confusion for him and his family, and as a result he has retained legal counsel.

He added that he does not want to have to discuss the news story or its allegations anymore. He said that he previously worked as an electrical engineer, but has not had an internet connection since 2013.

Saying that he is in poor health and dire financial straits, he claimed that the Newsweek story has damaged his job prospects.

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Dorian Nakamoto didn’t create Bitcoin and doesn’t know cryptography