EHT — Better Than Dilithium for PQC?

And, so, Dilithium has become the Post Quantum Cryptography (PQC) method of choice for digital signatures. It uses a lattice-based approach and has good performance and reasonably small signature sizes. But, it still requires two data packets within TLS to send the signature, and which will slow things down. This is because Dilithium 2 has a 2,420-byte signature, which must be fitted into a 1500-byte data packet. The search is thus on for a lattice-based method which has a smaller signature than Dilithium. For this, EHVT v3 and v4 are being considered as an additional digital signature standard.

The EHT method defines a post quantum cryptography lattice-based method for digital signatures [1]:

With EHT v3 Level 1 security, it has a 368-byte private key, and a relaively small signature of 169 bytes. Unfortunately, its public key for Level 1 security is 83,490 bytes. For EHVTv4 Level 1, we have a much smaller public key of 1,107 bytes, a private key of 419 bytes, and a signature size of 369 bytes. Both EHTv3 and EHTv4 have much smaller signatures compared with Dilithium.

If we compare EHVT v3 with Dilithium, we see the public key for EHVT v3 is much larger, but…