An explanation of cryptographic proof-of-work protocols, which are used in various cryptographic applications and in bitcoin mining. [10:31]

This video is a high-level explanation of digital signature schemes, which are a fundamental building block in many cryptographic protocols. [9:46]

This video explains 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. [11:15]