I've discovered that a client has SEED enabled in their SSL ciphers, and would like to know a bit more about it from a security perspective. The Wikipedia article doesn't mention any flaws, yet I've found two papers that demonstrate attacks - a differential fault analysis, which is fast but has infeasible requirements, and another differential attack that breaks 8 rounds.
For example, this paper says you can do key recovery by injecting faults into the input registers of the G function. What does that entail at a practical level?
Am I missing anything else? Is there anything I should warn them of?