Block Chain Related Protocols
From Wikipedia - 1
A block chain is a growing list of records, called blocks, which are linked using cryptography. Each block contains a cryptographic hash of the previous block, a timestamp, and transaction data (generally represented as a merkle tree root hash).
From Wikipedia - 2
A security protocol (cryptographic protocol or encryption protocol) is an abstract or concrete protocol that performs a security-related function and applies cryptographic methods, often as sequences of cryptographic primitives. A protocol describes how the algorithms should be used. A sufficiently detailed protocol includes details about data structures and representations, at which point it can be used to implement multiple, interoperable versions of a program.
From Market Protocol
A protocol can be seen as a methodology agreed upon by two or more parties that establish a common set of rules that they can agree upon so as to enter into a binding agreement. Protocols are therefore the set of rules that govern the network. Block chain protocols usually include rules about consensus, transaction validation, and network participation.
Protocol, in computer science, is a set of rules or procedures for transmitting data between electronic devices, such as computers. In order for computers to exchange information, there must be a preexisting agreement as to how the information will be structured and how each side will send and receive it. Without a protocol, a transmitting computer, for example, could be sending its data in 8-bit packets while the receiving computer might expect the data in 16-bit packets.