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We currently have ciphers optimized for performance, for compatibility, for size and for specific CPUs. However we lack a class of ciphers that is becoming increasingly important, as Zig is being used for embedded systems, but also as hardware-level side channels keep being found on (Intel) CPUs. Here is ISAPv2, a construction specifically designed for resilience against leakage and fault attacks. ISAPv2 is obviously not optimized for performance, but can be an option for highly sensitive data, when the runtime environment cannot be trusted.