diff --git a/json-web-token/src/main/java/kr/pe/elex/examples/JwtsSample.java b/json-web-token/src/main/java/kr/pe/elex/examples/JwtsSample.java
index 61785b0..7dae2b8 100644
--- a/json-web-token/src/main/java/kr/pe/elex/examples/JwtsSample.java
+++ b/json-web-token/src/main/java/kr/pe/elex/examples/JwtsSample.java
@@ -10,6 +10,7 @@ import io.jsonwebtoken.JwtException;
 import io.jsonwebtoken.Jwts;
 
 import javax.crypto.SecretKey;
+import javax.crypto.spec.SecretKeySpec;
 import java.security.KeyPair;
 import java.security.PrivateKey;
 import java.security.PublicKey;
@@ -28,6 +29,18 @@ public class JwtsSample {
 
 	}
 
+	public static byte[] getEncodedKey(SecretKey key) {
+		return key.getEncoded();
+	}
+
+	public static String getAlgorithmName(SecretKey key) {
+		return key.getAlgorithm();
+	}
+
+	public static SecretKey getSecretKey(byte[] encodedKey, String alg) {
+		return new SecretKeySpec(encodedKey, alg);
+	}
+
 	public static KeyPair generateKeyPair() {
 		return Jwts.SIG.RS512.keyPair().build();
 
@@ -76,6 +89,7 @@ public class JwtsSample {
 			throw e;
 		}
 	}
+
 	public static String decodeToken(final String token) throws JwtException {
 		String[] chunks = token.split("\\.");
 		Base64.Decoder decoder = Base64.getUrlDecoder();
@@ -87,6 +101,7 @@ public class JwtsSample {
 
 
 	}
+
 	public static String decodeToken2(final String token) throws JwtException {
 		String s = Jwts.parser().unsecured().build().parseSignedClaims(token)
 				.getPayload().getSubject();
diff --git a/json-web-token/src/test/java/kr/pe/elex/examples/SampleTest.java b/json-web-token/src/test/java/kr/pe/elex/examples/SampleTest.java
index 7a9ed95..e3e42f8 100644
--- a/json-web-token/src/test/java/kr/pe/elex/examples/SampleTest.java
+++ b/json-web-token/src/test/java/kr/pe/elex/examples/SampleTest.java
@@ -26,6 +26,31 @@ import java.util.Random;
 import static org.junit.jupiter.api.Assertions.*;
 
 class SampleTest {
+	@Test
+	void keyTest(){
+		SecretKey secretKey = JwtsSample.generateSecretKey();
+
+		byte[] rawKey = secretKey.getEncoded();
+		String alg = secretKey.getAlgorithm();
+
+		SecretKey secKey = JwtsSample.getSecretKey(rawKey, alg);
+
+		String token = Jwts.builder()
+				.header().type("JWT")
+				.and()
+				.issuer("Elex")
+				.expiration(Date.from(Instant.now().plus(3, ChronoUnit.HOURS)))
+				.claim("userId", 3)
+				.subject("hello")
+				.signWith(secretKey)
+				.compact();
+
+		String subject = Jwts.parser()
+				.verifyWith(secKey)
+				.requireIssuer("Elex") // 토큰의 Issuer 일치 여부 확인
+				.build().parseSignedClaims(token).getPayload().getSubject();
+		System.out.println(subject);
+	}
 @Test
 void test2(){
 	final SecretKey signingKey = Jwts.SIG.HS384.key().build();