DM-RSA is an RSA variant that relies on two independent moduli, designed as a fault-detection countermeasure based on physical diversity. The original version, however, was shown to be vulnerable: according to the paper's abstract, it was broken by Håstad's attack and also contained an incorrect compromise-tolerance claim.
The new work, titled "DM-RSA-OAEP: Formal Treatment of a Dual-Modulus Fault-Detection Countermeasure Based on Physical Diversity," revisits the scheme and provides a formal treatment of its repaired variant. The abstract indicates that the repair is the focus of the paper, though the specific details of the fix are not described in the available text.
This formal analysis is significant because it addresses known weaknesses in a proposed countermeasure, offering a clearer basis for evaluating whether the repaired DM-RSA-OAEP can actually deliver the fault-detection and security properties it claims.