Khan Academy

A detailed explanation of what makes bitcoin transaction block chains secure.

Video by Zulfikar Ramzan. Zulfikar Ramzan is a world-leading expert in computer security and cryptography and is currently the Chief Scientist...

Sal Khan, founder of Khan Academy, talks about his life and how he started the Khan Academy, and is interviewed by MIT's president, Rafael Reif on Wednesday, May 8th.

What is bitcoin?

Video by Zulfikar Ramzan. Zulfikar Ramzan is a world-leading expert in computer security and cryptography and is currently the Chief Scientist at Sourcefire. He received his Ph.D. in computer science fro...

The mechanisms by which the supply of bitcoins is controlled.

Video by Zulfikar Ramzan. Zulfikar Ramzan is a world-leading expert in computer security and cryptography and is currently the Chief Scientist at Sourcefire. ...

The mechanics of a bitcoin transaction block chain, which is a construct that is generated by bitcoin miners and functions as a global ledger for recording and validating bitcoins.

Video by Zulfikar Ramzan. Zulfikar Ramza...

An explanation of cryptographic proof-of-work protocols, which are used in various cryptographic applications and in bitcoin mining.

Video by Zulfikar Ramzan. Zulfikar Ramzan is a world-leading expert in computer security...

The basic mechanics of a bitcoin transaction between two parties and what is included within a given bitcoin transaction record.

Video by Zulfikar Ramzan. Zulfikar Ramzan is a world-leading expert in computer security and...

A high-level explanation of digital signature schemes, which are a fundamental building block in many cryptographic protocols.

Video by Zulfikar Ramzan. Zulfikar Ramzan is a world-leading expert in computer security and c...

What cryptographic hash functions are and what properties are desired of them.

Video by Zulfikar Ramzan. Zulfikar Ramzan is a world-leading expert in computer security and cryptography and is currently the Chief Scientist...

An introduction to the mechanics of bitcoins and an overview of how transactions take place.

Video by Zulfikar Ramzan. Zulfikar Ramzan is a world-leading expert in computer security and cryptography and is currently the ...

April 17, 2013 at the Khan Academy office in Mountain View

German and Italian Empires and TsingTao Beer

Sal Khan speaks at the Adobe Digital Marketing Summit 2013 on Thu, Mar 7, 2013 in Salt Lake City, UT.