Malicious Cryptography: Kleptographic Aspects

Abstract. In the last few years we have concentrated our research efforts on new threats to the computing infrastructure that are the result of combining malicious software (malware) technology with modern cryptography. At some point during our investigation we ended up asking ourselves the following question: what if the malware (i.e., Trojan horse) resides within a cryptographic system itself? This led us to realize that in certain scenarios of black box cryptography (namely, when the code is inaccessible to scrutiny as in the case of tamper proof cryptosystems or when no one cares enough to scrutinize the code) there are attacks that employ cryptography itself against cryptographic systems in such a way that the attack possesses unique properties (i.e., special advantages that attackers have such as granting the attacker exclusive access to crucial information where the exclusive access privelege holds even if the Trojan is reverse-engineered). We called the art of designing this se...

• Type: Conference
• Year: 2005
• Where: CTRSA
• Authors: Adam Young, Moti Yung
• Keywords: Black Box Cryptography, Cryptology, CTRSA 2005, Exclusive Access, Tamper Proof Cryptosystems