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Corona is Lux's fork of Ringtail (ePrint 2024/1113) = two-round Module-LWE
(M=8, N=7 over R_q=Z_q[X]/(X^256+1), q=0x1000000004A01 48-bit, sigma=6.108) —
NOT Ring-LWE rank-1. Corona.lean: hardness Module-LWE; axiom corona_ring_lwe_euf_cma
-> corona_module_lwe_euf_cma; EUF-CMA reduces to Module-LWE; params corrected
(was q=2^32/sigma=13744). Corona/{OutputInterchange,Unforgeability,dkg2}, Quasar,
Magnetar, HQC, BLS, Threshold_Lagrange label fixes. 'Ring-LWE = Module-LWE rank 1'
kept only as general math remark. lake build: success.