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Re:Who Owns Express VPN, Nord, Surfshark? VPN Relationships ... by MoonObserver on Tuesday October 07, 2025 @11:38AM (#45504509)
Intel TDX unfortunately suffers from the exact same vulnerability as Scalable SGX. The underlying root cause is the lack of randomized encryption; using a static-adversary encryption scheme (XTS) rather than a dynamic-adversary one. The result is that plaintext-ciphertext mappings are unchanged at a fixed memory address. While the choice of scheme might initially seem puzzling, it is due to a randomized encryption scheme requiring counters for each memory block, which has a prohibitive on-chip memory cost when scaling to hundreds of GBs of memory.

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