sampleNTT(ρ, j, i) } // decryptionKey is the parsed and expanded form of a PKE decryption key. type decryptionKey struct { s [k]nttElement // ByteDecode₁₂(dk[:decryptionKeySize]) } // GenerateKey768 generates a new decapsulation key, drawing random bytes from // a DRBG. The decapsulation key must be kept secret. func GenerateKey768() (*DecapsulationKey768, error) { // The actual logic is in a separate function to outline this allocation. dk := &DecapsulationKey768{} return generateKey(dk) } func generateKey(dk...