Talk:Cryptographic protocol

Computing Mid‑importance

	This article is within the scope of WikiProject Computing, a collaborative effort to improve the coverage of computers, computing, and information technology on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.ComputingWikipedia:WikiProject ComputingTemplate:WikiProject ComputingComputing articles
Mid	This article has been rated as Mid-importance on the project's importance scale.

Cryptography: Computer science High‑importance

	This article is within the scope of WikiProject Cryptography, a collaborative effort to improve the coverage of Cryptography on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.CryptographyWikipedia:WikiProject CryptographyTemplate:WikiProject CryptographyCryptography articles
High	This article has been rated as High-importance on the importance scale.
	This article is supported by WikiProject Computer science (assessed as High-importance).

Numismatics Low‑importance

	Numismatics portal This article is within the scope of WikiProject Numismatics, a collaborative effort to improve the coverage of numismatics and currencies on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.NumismaticsWikipedia:WikiProject NumismaticsTemplate:WikiProject Numismaticsnumismatic articles
Low	This article has been rated as Low-importance on the project's importance scale.

Cryptocurrency Low‑importance

	This article is within the scope of WikiProject Cryptocurrency, a collaborative effort to improve the coverage of cryptocurrency on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.CryptocurrencyWikipedia:WikiProject CryptocurrencyTemplate:WikiProject CryptocurrencyWikiProject Cryptocurrency articles
Low	This article has been rated as Low-importance on the importance scale.

Name

I would suggest this would be better named "Security protocol" than "Cryptographic protocol", as the latter is about ten times more common in a Google search. Any objections? — Matt Crypto 17:52, 24 Mar 2005 (UTC)

Both works fine for me. Although for me "Security protocol" has a wider meaning and might include soft human issues etc. --David Göthberg 21:18, 2 November 2005 (UTC)[reply]

I suggest the following definition for a cryptographic protocol. A cryptographic protocol employs cryptographic methods and message passing to allow agreement on values by participants in the presence of an adversary. For example, an authentication protocol allows agreement on the identity of some participants, and a confidentiality protocol allows agreement on a shared secret. Ramsdell (talk) 02:09, 27 October 2008 (UTC)[reply]

It is the name used in the literature and publications because it is the field of modern cryptography in conjunction with distributed computing (O. Goldreich, �Cryptography and cryptographic protocols,� Distributed Computing, vol. 16, no. 2-3, pp. 177�199, 2003.) Mohammad Al-Aggan (talk) 02:44, 9 January 2010 (UTC)[reply]

Relation to cryptographic schema

I have read that a cryptographic scheme is the sum of algorithms to: - create a secret private key (or shared password) and the associated public key - Deliver public keys to involved parties - Encrypt with the secret a payload or sign such payload. - Decrypt the encrypted payload or verify the signature. Isn't in this sense a cryptographic scheme the same that a cryptographic protocol? Or a protocol is the sum of many schemes? (Looks to me this is the correct answer). Does a protocol always refer to something related with two (or more) remote (physically distant) parties or does it applies to maybe a local protocol to encrypt a file and decrypt (locally) later on?