What is Attack model?
'''Attack models''' or '''attack types'''{{ref|secondname}} specify how much information a [[Cryptanalysis|cryptanalyst]] has access to when ''breaking'' or ''cracking'' an [[Encryption|encrypted]] message, commonly known as '''codebreaking''' or '''cracking the code'''. Some common attack models are: *[[Ciphertext-only attack]] *[[Known-plaintext attack]] *[[Chosen-plaintext attack]] *[[Chosen-ciphertext attack]] **[[Chosen-ciphertext attack#Adaptive chosen-ciphertext attack|Adaptive chosen-ciphertext attack]] **[[Chosen-ciphertext attack#Lunchtime attacks|Indifferent chosen-ciphertext attack]] The ciphertext-only attack model is the weakest because it implies that the cryptanalyst has just the encoded message. Different attack models are used for other cryptographic systems, or more generally for all kind of security systems. Examples for such attack models are: *[[Digital signature#Digital signature security and attacks|Adaptive chosen-message attack]] for [[digital signature]]s ==References== *{{note|secondname}} [http://islab.oregonstate.edu/koc/ece575/notes/L2.ppt Information Security Laboratory] {{Webarchive|url=https://web.archive.org/web/20060902081253/http://islab.oregonstate.edu/koc/ece575/notes/L2.ppt |date=2006-09-02 }} ([[Microsoft PowerPoint|powerpoint]]) *{{cite book |author= Niels Ferguson |author2= Bruce Schneier |editor=Carol A. Long |year= 2003 |title= Practical Cryptography |url= https://archive.org/details/practicalcryptog00unse |chapter= Introduction to Cryptography: Attacks |pages= [https://archive.org/details/practicalcryptog00unse/page/30 30]–32 |publisher= Wiley Publishing Inc |isbn= 0-471-22894-X |edition = Hardcover }} ==Other websites== *[http://serl.cs.colorado.edu/~alw/edu/SEprelim-src/Black-UNESCO01.pdf University of Colorado at Boulder's introduction to Cryptography and attack models] {{Webarchive|url=https://web.archive.org/web/20060922152921/http://serl.cs.colorado.edu/~alw/edu/SEprelim-src/Black-UNESCO01.pdf |date=2006-09-22 }} (PDF) *[http://www.cacr.math.uwaterloo.ca/~ds