Round Addition Differential Fault Analysis against the Lightweight Block Cipher CHAM

Key Points

• Full secret keys of CHAM can be recovered through round-addition differential fault analysis, significantly reducing the number of required rounds.
• In particular, 2 rounds suffice for CHAM-64/128 and CHAM-128/256, while only 1 round is necessary for CHAM-128/128.
• Observational analysis highlights the security vulnerabilities of the lightweight cipher CHAM when subjected to faults in its operations.
• The findings indicate that current security measures may be inadequate, calling for improved strategies to protect the cipher.