diff --git a/src/main/java/com/palnet/server/encrptn/kisa/KISA_SEED_CBC.java b/src/main/java/com/palnet/server/encrptn/kisa/KISA_SEED_CBC.java
index cf3455d..8710901 100644
--- a/src/main/java/com/palnet/server/encrptn/kisa/KISA_SEED_CBC.java
+++ b/src/main/java/com/palnet/server/encrptn/kisa/KISA_SEED_CBC.java
@@ -164,8 +164,9 @@ public class KISA_SEED_CBC {
 	// R0, R1 : right input values at each round
 	// K : round keys at each round
 	private static final void SeedRound(int[] T, int LR[], int L0, int L1, int R0, int R1, int[] K, int K_offset) {
+		int offset = K_offset + 0;
 		int offset1 = K_offset + 1;
-		T[0] = LR[R0] ^ K[K_offset];
+		T[0] = LR[R0] ^ K[offset];
 		T[1] = LR[R1] ^ K[offset1];
 		T[1] ^= T[0];
 		T[1] = SS0[GetB0(T[1])&0x0ff] ^ SS1[GetB1(T[1])&0x0ff] ^