diff --git a/owasp/suppressions.xml b/owasp/suppressions.xml
index 9b62800..84898b8 100644
--- a/owasp/suppressions.xml
+++ b/owasp/suppressions.xml
@@ -26,4 +26,11 @@
     <cve>CVE-2018-1272</cve>
     <cve>CVE-2020-5421</cve>
   </suppress>
+  <suppress>
+    <notes>the issues was fixed in used kotlin version 1.4.31</notes>
+    <cve>CVE-2020-29582</cve>
+    <cve>CVE-2019-10102</cve>
+    <cve>CVE-2019-10101</cve>
+    <cve>CVE-2019-10103</cve>
+  </suppress>
 </suppressions>
diff --git a/src/test/java/eu/europa/ec/dgc/issuance/service/DGCGenTest.java b/src/test/java/eu/europa/ec/dgc/issuance/service/DGCGenTest.java
new file mode 100644
index 0000000..432cb23
--- /dev/null
+++ b/src/test/java/eu/europa/ec/dgc/issuance/service/DGCGenTest.java
@@ -0,0 +1,121 @@
+package eu.europa.ec.dgc.issuance.service;
+
+import com.upokecenter.cbor.CBORObject;
+import com.upokecenter.cbor.CBORType;
+import ehn.techiop.hcert.kotlin.chain.common.Base45Encoder;
+import eu.europa.ec.dgc.issuance.entity.GreenCertificateType;
+import eu.europa.ec.dgc.issuance.restapi.dto.DgciIdentifier;
+import eu.europa.ec.dgc.issuance.restapi.dto.DgciInit;
+import eu.europa.ec.dgc.issuance.restapi.dto.EgcDecodeResult;
+import eu.europa.ec.dgc.issuance.restapi.dto.IssueData;
+import eu.europa.ec.dgc.issuance.restapi.dto.SignatureData;
+import java.io.ByteArrayInputStream;
+import java.io.IOException;
+import java.nio.charset.StandardCharsets;
+import java.time.Duration;
+import java.time.ZonedDateTime;
+import java.time.temporal.ChronoUnit;
+import java.util.Base64;
+import java.util.zip.Deflater;
+import java.util.zip.DeflaterInputStream;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+
+import static org.junit.jupiter.api.Assertions.assertNull;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+/**
+ * The test shows how produce edgc from json the same way the frontend is doing
+ * using CBOR primitives
+ */
+@SpringBootTest
+class DGCGenTest {
+    @Autowired
+    DgciService dgciService;
+
+    @Autowired
+    EdgcValidator edgcValidator;
+
+    @Autowired
+    CertificateService certificateService;
+
+    @Test
+    void genEDGC() throws IOException {
+        String edgcJson = "{\"ver\":\"1.0.0\",\"nam\":{\"fn\":\"Garcia\",\"fnt\":\"GARCIA\"," +
+            "\"gn\":\"Francisco\",\"gnt\":\"FRANCISCO\"},\"dob\":\"1991-01-01\",\"v\":[{\"tg\":\"840539006\"," +
+            "\"vp\":\"1119305005\",\"mp\":\"EU/1/20/1507\",\"ma\":\"ORG-100001699\",\"dn\":1,\"sd\":2,\"dt\":" +
+            "\"2021-05-14\",\"co\":\"CY\",\"is\":\"Neha\",\"ci\":\"dgci:V1:CY:HIP4OKCIS8CXKQMJSSTOJXAMP:03\"}]}";
+        String countryCode = "DE";
+        ZonedDateTime now = ZonedDateTime.now();
+        ZonedDateTime expiration = now.plus(Duration.of(365, ChronoUnit.DAYS));
+        long issuedAt = now.toInstant().getEpochSecond();
+        long expirationSec = expiration.toInstant().getEpochSecond();
+        byte[] keyId = "key".getBytes(StandardCharsets.UTF_8);
+        int algId = -7;
+
+        DgciInit dgciInit = new DgciInit();
+        dgciInit.setGreenCertificateType(GreenCertificateType.Test);
+        DgciIdentifier certData = dgciService.initDgci(dgciInit);
+
+        byte[] dgcCbor = genDGCCbor(edgcJson, countryCode, issuedAt, certData.getExpired());
+        byte[] coseBytes = genCoseUnsigned(dgcCbor, Base64.getDecoder().decode(certData.getKid())
+            ,certData.getAlgId());
+        byte[] hash = dgciService.computeCoseSignHash(coseBytes);
+        IssueData issueData = new IssueData();
+        issueData.setHash(Base64.getEncoder().encodeToString(hash));
+        SignatureData sign = dgciService.finishDgci(certData.getId(), issueData);
+        byte[] coseSigned = genSetSignature(coseBytes,Base64.getDecoder().decode(sign.getSignature()));
+        String edgcQR = coseToQRCode(coseSigned);
+
+        EgcDecodeResult validationResult = edgcValidator.decodeEdgc(edgcQR);
+        assertTrue(validationResult.isValidated());
+        assertNull(validationResult.getErrorMessage());
+    }
+
+    private byte[] genDGCCbor(String edgcJson, String countryCode, long issuedAt, long expirationSec) {
+        CBORObject map = CBORObject.NewMap();
+        map.set(CBORObject.FromObject(1),CBORObject.FromObject(countryCode));
+        map.set(CBORObject.FromObject(6),CBORObject.FromObject(issuedAt));
+        map.set(CBORObject.FromObject(4),CBORObject.FromObject(expirationSec));
+        CBORObject hcertVersion = CBORObject.NewMap();
+        CBORObject hcert = CBORObject.FromJSONString(edgcJson);
+        hcertVersion.set(CBORObject.FromObject(1),hcert);
+        map.set(CBORObject.FromObject(-260),hcertVersion);
+        return map.EncodeToBytes();
+    }
+
+    private byte[] genCoseUnsigned(byte[] payload,byte[] keyId,int algId) {
+        CBORObject protectedHeader = CBORObject.NewMap();
+        protectedHeader.set(CBORObject.FromObject(1),CBORObject.FromObject(algId));
+        protectedHeader.set(CBORObject.FromObject(4),CBORObject.FromObject(keyId));
+        byte[] protectedHeaderBytes = protectedHeader.EncodeToBytes();
+
+        CBORObject coseObject = CBORObject.NewArray();
+        coseObject.Add(protectedHeaderBytes);
+        coseObject.Add(CBORObject.NewMap());
+        coseObject.Add(CBORObject.FromObject(payload));
+        byte[] sigDummy = new byte[0];
+        coseObject.Add(CBORObject.FromObject(sigDummy));
+        return CBORObject.FromObjectAndTag(coseObject,18).EncodeToBytes();
+    }
+
+    private byte[] genSetSignature(byte[] coseData,byte[] signature) {
+        CBORObject cborObject = CBORObject.DecodeFromBytes(coseData);
+        if (cborObject.getType() == CBORType.Array && cborObject.getValues().size()==4) {
+            cborObject.set(3,CBORObject.FromObject(signature));
+        } else {
+            throw new IllegalArgumentException("seems not to be cose");
+        }
+        return cborObject.EncodeToBytes();
+    }
+
+    private String coseToQRCode(byte[] cose) throws IOException {
+        ByteArrayInputStream bis = new ByteArrayInputStream(cose);
+        DeflaterInputStream compessedInput = new DeflaterInputStream(bis, new Deflater(9));
+        byte[] coseCompressed = compessedInput.readAllBytes();
+        Base45Encoder base45Encoder = new Base45Encoder();
+        String coded = base45Encoder.encode(coseCompressed);
+        return "HC1:"+coded;
+    }
+}