Algorithm Profiles Phillip Hallam-Baker Principal Scientist - PowerPoint PPT Presentation

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Algorithm Profiles Phillip Hallam-Baker Principal Scientist VeriSign Inc. Traditional Approach Plat du jour + A-la-carte MUST implement Becomes obsolete A-la-carte Combinatorial explosion Hidden Constraints Box says supports SHA-1,

Algorithm Profiles Phillip Hallam-Baker Principal Scientist VeriSign Inc.
Traditional Approach
Plat du jour + A-la-carte
MUST implement Becomes obsolete
A-la-carte Combinatorial explosion
Hidden Constraints Box says ‘supports SHA-1, SHA-256, RSA, DSA’ BUT DSA implementation does not support SHA-256
Result Many variations to test Many configurations for security analysis Real ‘must implement’ deviates from specification Hidden constraints are not exposed
Objectives Constrain number of variations Allow for specialty (vanity) crypto
Proposal Quantum Profiles
Each Profile defines One encryption, one digest, one MAC, one key exchange, one signature, &ct. Has unique URI [Parameters, Modes]
Finite Field Profile RSA SHA2 HMAC-SHA2 AES One C18N
ECC Profile NIST Suite B One C18N
SHA3 Profile To be released 2009/2010
Non-Standard Profile NIST Suite A Private definition
Parameters / Modes Limited, discrete options Master profile specifies set of sub profiles
Finite Field Profile Level1: RSA2048, SHA256, AES128 Level1a: RSA4096, SHA256, AES128 Level2: RSA3072, SHA386, AES192 Level3: RSA4096, SHA512, AES256 Level3x = Level1 + Level1a + Level2 + Level3
Finite Field Profile v2007 Level1: RSA2048, SHA256, AES128 Level2: RSA4096, SHA256, AES128 Level3: RSA4096, SHA512, AES256 Level3x = Level1 + Level2 + Level3
Finite Field Profile v2009 Level1: RSA2048-RND-PSS, SHA256, AES128 Level2: RSA4096-RND-PSS, SHA256, AES128 Level3: RSA4096-RND-PSS, SHA512, AES256
URIs e.g. http://w3.org/2008/xmlsec/profile-ff-level1 [Intentionally opaque]
Question Specify Crypto and XML issues in same profile Specify separate profiles for crypto and XML

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