CROO: A Universal Infrastructure and Protocol to Detect Identity Fraud

Abstract. Identity fraud (IDF) may be defined as unauthorized exploitation of credential information through the use of false identity. We propose CROO, a universal (i.e. generic) infrastructure and protocol to either prevent IDF (by detecting attempts thereof), or limit its consequences (by identifying cases of previously undetected IDF). CROO is a capture resilient one-time password scheme, whereby each user must carry a personal trusted device used to generate one-time passwords (OTPs) verified by online trusted parties. Multiple trusted parties may be used for increased scalability. OTPs can be used regardless of a transaction's purpose (e.g. user authentication or financial payment), associated credentials, and online or on-site nature; this makes CROO a universal scheme. OTPs are not sent in cleartext; they are used as keys to compute MACs of hashed transaction information, in a manner allowing OTP-verifying parties to confirm that given user credentials (i.e. OTPkeyed MACs)...

• Type: Conference
• Year: 2008
• Where: ESORICS
• Authors: D. Nali, Paul C. van Oorschot
• Keywords: ESORICS 2008, One-time Passwords, Security Privacy, Transaction Details, User Credentials