diff --git a/CMakeLists.txt b/CMakeLists.txt
index c3fe32e..906c1ec 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -25,9 +25,9 @@ if (ANDROID)
 endif()
 
 if (NOT QT_VERSION_MAJOR)
-    find_package(QT NAMES Qt6 Qt5 COMPONENTS Core Test REQUIRED)
+    find_package(QT NAMES Qt6 Qt5 COMPONENTS Core Network Test REQUIRED)
 endif()
-find_package(Qt${QT_VERSION_MAJOR} COMPONENTS Core Test REQUIRED)
+find_package(Qt${QT_VERSION_MAJOR} COMPONENTS Core Network Test REQUIRED)
 
 include(submodules/CMake/QuasarApp.cmake)
 
diff --git a/src/lib/CMakeLists.txt b/src/lib/CMakeLists.txt
index 9aca4a0..a4911da 100644
--- a/src/lib/CMakeLists.txt
+++ b/src/lib/CMakeLists.txt
@@ -33,7 +33,7 @@ set(PRIVATE_INCUDE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/src/private")
 
 add_library(${CURRENT_PROJECT} ${SOURCE_CPP} ${SOURCE_QRC})
 
-target_link_libraries(${CURRENT_PROJECT} PUBLIC Qt${QT_VERSION_MAJOR}::Core )
+target_link_libraries(${CURRENT_PROJECT} PUBLIC Qt${QT_VERSION_MAJOR}::Network Qt${QT_VERSION_MAJOR}::Core )
 
 if (EASYSSL_STATIC_SSL)
 
diff --git a/src/lib/src/private/easysslutils.cpp b/src/lib/src/private/easysslutils.cpp
index 85bf5db..31f6b89 100644
--- a/src/lib/src/private/easysslutils.cpp
+++ b/src/lib/src/private/easysslutils.cpp
@@ -8,6 +8,7 @@
 #include "easysslutils.h"
 #include <openssl/bn.h>
 #include <openssl/err.h>
+#include <openssl/pem.h>
 #include <openssl/types.h>
 #include <QVector>
 
@@ -57,4 +58,36 @@ BIO* EasySSLUtils::byteArrayToBio(const QByteArray& byteArray) {
     return bio;
 }
 
+QByteArray EasySSLUtils::extractPublcKey(EVP_PKEY *ssl_keys) {
+    if (!ssl_keys)
+        return {};
+
+    BIO* bio = BIO_new(BIO_s_mem());
+    if (PEM_write_bio_PUBKEY(bio, ssl_keys) != 1) {
+        BIO_free(bio);
+        return {};
+    }
+
+    QByteArray pubKey = bioToByteArray(bio);
+    BIO_free(bio);
+
+    return pubKey;
+}
+
+QByteArray EasySSLUtils::extractPrivateKey(EVP_PKEY *ssl_keys) {
+    if (!ssl_keys)
+        return {};
+
+    BIO* bio = BIO_new(BIO_s_mem());
+    if (PEM_write_bio_PrivateKey(bio, ssl_keys, nullptr, nullptr, 0, nullptr, nullptr) != 1) {
+        BIO_free(bio);
+        return {};
+    }
+
+    QByteArray pKey = bioToByteArray(bio);
+    BIO_free(bio);
+
+    return pKey;
+}
+
 }
diff --git a/src/lib/src/private/easysslutils.h b/src/lib/src/private/easysslutils.h
index 651099f..aea9adc 100644
--- a/src/lib/src/private/easysslutils.h
+++ b/src/lib/src/private/easysslutils.h
@@ -53,6 +53,21 @@ public:
      */
     [[nodiscard("This pointer will not free automatically. Please free returned pointer after using.")]]
     static BIO *byteArrayToBio(const QByteArray &byteArray);
+
+    /**
+     * @brief extractPublcKey This method extracts publick key from the ssl (pem) structure.
+     * @param ssl_keys This is ssl keys objects.
+     * @return bytes array of the extracted key.
+     */
+    static QByteArray extractPublcKey(EVP_PKEY* ssl_keys);
+
+    /**
+     * @brief extractPrivateKey This method extracts private key from the ssl (pem) structure.
+     * @param ssl_keys This is ssl keys objects.
+     * @return bytes array of the extracted key.
+     */
+    static QByteArray extractPrivateKey(EVP_PKEY* ssl_keys);
+
 };
 
 
diff --git a/src/lib/src/public/easyssl/icertificate.cpp b/src/lib/src/public/easyssl/icertificate.cpp
new file mode 100644
index 0000000..ec10073
--- /dev/null
+++ b/src/lib/src/public/easyssl/icertificate.cpp
@@ -0,0 +1,23 @@
+/*
+ * Copyright (C) 2021-2023 QuasarApp.
+ * Distributed under the GPLv3 software license, see the accompanying
+ * Everyone is permitted to copy and distribute verbatim copies
+ * of this license document, but changing it is not allowed.
+*/
+
+
+
+#include "icertificate.h"
+
+
+namespace EasySSL {
+
+ICertificate::ICertificate(const QSharedPointer<ICrypto> &generator) {
+    _keyGenerator = generator;
+}
+
+const QSharedPointer<ICrypto> &ICertificate::keyGenerator() const {
+    return _keyGenerator;
+}
+
+}
diff --git a/src/lib/src/public/easyssl/icertificate.h b/src/lib/src/public/easyssl/icertificate.h
new file mode 100644
index 0000000..f8c663a
--- /dev/null
+++ b/src/lib/src/public/easyssl/icertificate.h
@@ -0,0 +1,71 @@
+/*
+ * Copyright (C) 2021-2023 QuasarApp.
+ * Distributed under the GPLv3 software license, see the accompanying
+ * Everyone is permitted to copy and distribute verbatim copies
+ * of this license document, but changing it is not allowed.
+*/
+
+#ifndef ICERTIFICATE_H
+#define ICERTIFICATE_H
+
+#include <QSslCertificate>
+#include <QSslKey>
+#include "easyssl/icrypto.h"
+#include "global.h"
+#include <QByteArray>
+
+namespace EasySSL {
+
+/**
+ * @brief The SslSrtData struct This structure contains base information for generate self signed ssl certefication.
+ */
+struct SslSrtData {
+    QString country = "BY";
+    QString organization = "QuasarApp";
+    QString commonName = "";
+    long long endTime = 31536000L; //1 year
+};
+
+/**
+ * @brief The SelfSignedSertificate struct contains qt certificate object and private key of them.
+ */
+struct EASYSSL_EXPORT SelfSignedSertificate {
+    SelfSignedSertificate(){}
+    SelfSignedSertificate(const SelfSignedSertificate & other)  {
+        crt = other.crt;
+        key = other.key;
+    };
+    QSslCertificate crt;
+    QSslKey key;
+};
+
+/**
+ * @brief The ICertificate class is base interface for all certificate generators classes.
+ *
+ */
+class EASYSSL_EXPORT ICertificate
+{
+public:
+
+    ICertificate(const QSharedPointer<ICrypto>& generator);
+
+    /**
+     * @brief create This method create a self signed certificate.
+     * @param certificateData This input extra data of certificate.
+     * @return certificate data with private key.
+     */
+    virtual SelfSignedSertificate create(const SslSrtData& certificateData) const = 0;
+
+protected:
+    /**
+     * @brief generator This method return private key generator.
+     * @return private key generator.
+     */
+    const QSharedPointer<ICrypto>& keyGenerator() const;
+
+private:
+    QSharedPointer<ICrypto> _keyGenerator;
+};
+
+}
+#endif // ICERTIFICATE_H
diff --git a/src/lib/src/public/easyssl/icrypto.cpp b/src/lib/src/public/easyssl/icrypto.cpp
new file mode 100644
index 0000000..9ce0f49
--- /dev/null
+++ b/src/lib/src/public/easyssl/icrypto.cpp
@@ -0,0 +1,28 @@
+/*
+ * Copyright (C) 2021-2023 QuasarApp.
+ * Distributed under the GPLv3 software license, see the accompanying
+ * Everyone is permitted to copy and distribute verbatim copies
+ * of this license document, but changing it is not allowed.
+*/
+
+#include "icrypto.h"
+
+#include <easysslutils.h>
+#include <openssl/bio.h>
+#include <openssl/pem.h>
+
+namespace EasySSL {
+
+bool EasySSL::ICrypto::makeKeys(QByteArray &pubKey, QByteArray &privKey) const
+{
+    EVP_PKEY *keys = makeRawKeys();
+    if (!keys)
+        return false;
+
+    pubKey = EasySSLUtils::extractPublcKey(keys);
+    privKey = EasySSLUtils::extractPrivateKey(keys);
+    return true;
+}
+
+
+}
diff --git a/src/lib/src/public/easyssl/icrypto.h b/src/lib/src/public/easyssl/icrypto.h
index 4a5938b..42c7a68 100644
--- a/src/lib/src/public/easyssl/icrypto.h
+++ b/src/lib/src/public/easyssl/icrypto.h
@@ -10,7 +10,9 @@
 #define I_CRYPTO_H
 
 #include "global.h"
+#include "qssl.h"
 #include <QByteArray>
+#include <openssl/types.h>
 
 namespace EasySSL {
 
@@ -38,7 +40,19 @@ public:
      * @param privKey This is result private key.
      * @return true if keys generated successful.
      */
-    virtual bool makeKeys(QByteArray &pubKey, QByteArray &privKey) const = 0;
+    bool makeKeys(QByteArray &pubKey, QByteArray &privKey) const;
+
+    /**
+     * @brief makeKeys This method generate the public and private keys of the ECDSA.
+     * @return pointer to generated keys.
+     */
+    virtual EVP_PKEY * makeRawKeys() const = 0;
+
+    /**
+     * @brief keyAlgorithm This method should be return Qt Key algorithm (needed for generate cetrificates.)
+     * @return
+     */
+    virtual QSsl::KeyAlgorithm keyAlgorithm() const = 0;
 
     /**
      * @brief supportedFeatures This method should return supported featurs of the current encription alhorithm
diff --git a/src/lib/src/public/easyssl/rsassl30.cpp b/src/lib/src/public/easyssl/rsassl30.cpp
index 56148ed..01b4fed 100644
--- a/src/lib/src/public/easyssl/rsassl30.cpp
+++ b/src/lib/src/public/easyssl/rsassl30.cpp
@@ -20,37 +20,17 @@ RSASSL30::RSASSL30() {
 
 }
 
-bool RSASSL30::makeKeys(QByteArray &pubKey, QByteArray &privKey) const {
+EVP_PKEY * RSASSL30::makeRawKeys() const {
 
     EVP_PKEY *pkey = nullptr;
-    EVP_PKEY_CTX *pctx =  EVP_PKEY_CTX_new_from_name(NULL, "RSA", NULL);
+    EVP_PKEY_CTX *pctx =  EVP_PKEY_CTX_new_from_name(nullptr, "RSA", nullptr);
     EVP_PKEY_CTX_set_rsa_keygen_bits(pctx, 4096);
 
     EVP_PKEY_keygen_init(pctx);
     EVP_PKEY_generate(pctx, &pkey);
     EVP_PKEY_CTX_free(pctx);
 
-    if (!pkey) {
-        return false;
-    }
-
-    BIO* bio = BIO_new(BIO_s_mem());
-    if (PEM_write_bio_PUBKEY(bio, pkey) != 1) {
-        EVP_PKEY_free(pkey);
-        return false;
-    }
-    pubKey = EasySSLUtils::bioToByteArray(bio);
-
-    if (PEM_write_bio_PrivateKey(bio, pkey, nullptr, nullptr, 0, nullptr, nullptr) != 1)
-    {
-        EVP_PKEY_free(pkey);
-        return false;
-    }
-
-    privKey = EasySSLUtils::bioToByteArray(bio);
-
-    return true;
-
+    return pkey;
 }
 
 ICrypto::Features RSASSL30::supportedFeatures() const {
diff --git a/src/lib/src/public/easyssl/rsassl30.h b/src/lib/src/public/easyssl/rsassl30.h
index 25ecab0..951f2a1 100644
--- a/src/lib/src/public/easyssl/rsassl30.h
+++ b/src/lib/src/public/easyssl/rsassl30.h
@@ -1,3 +1,11 @@
+//#
+//# Copyright (C) 2021-2023 QuasarApp.
+//# Distributed under the GPLv3 software license, see the accompanying
+//# Everyone is permitted to copy and distribute verbatim copies
+//# of this license document, but changing it is not allowed.
+//#
+
+
 #ifndef RSASSL30_H
 #define RSASSL30_H
 
@@ -14,10 +22,9 @@ class EASYSSL_EXPORT RSASSL30: public EasySSL::ICrypto
 public:
     RSASSL30();
 
-    bool makeKeys(QByteArray &pubKey, QByteArray &privKey) const override;
+    EVP_PKEY *makeRawKeys() const override;
     Features supportedFeatures() const override;
 
-
     QByteArray signMessage(const QByteArray &inputData, const QByteArray &key) const override;
     bool checkSign(const QByteArray &inputData, const QByteArray &signature, const QByteArray &key) const override;
 
diff --git a/src/lib/src/public/easyssl/x509.cpp b/src/lib/src/public/easyssl/x509.cpp
index a184a17..fb2db39 100644
--- a/src/lib/src/public/easyssl/x509.cpp
+++ b/src/lib/src/public/easyssl/x509.cpp
@@ -1,6 +1,86 @@
-#include "x509.h"
+//#
+//# Copyright (C) 2021-2023 QuasarApp.
+//# Distributed under the GPLv3 software license, see the accompanying
+//# Everyone is permitted to copy and distribute verbatim copies
+//# of this license document, but changing it is not allowed.
+//#
 
-X509::X509()
-{
+#include "x509.h"
+#include <openssl/evp.h>
+#include <openssl/pem.h>
+#include <openssl/x509.h>
+#include <easysslutils.h>
+namespace EasySSL {
+
+X509::X509(const QSharedPointer<ICrypto>& generator): ICertificate(generator) {
+
+}
+
+SelfSignedSertificate X509::create(const SslSrtData &certificateData) const {
+    SelfSignedSertificate result;
+    if (!(keyGenerator()->supportedFeatures() & ICrypto::Features::Signing)) {
+        return {};
+    }
+
+    EVP_PKEY *pkey = keyGenerator()->makeRawKeys();
+
+    ::X509 * x509 = nullptr;
+    X509_NAME * name = nullptr;
+
+    x509 = X509_new();
+    q_check_ptr(x509);
+    ASN1_INTEGER_set(X509_get_serialNumber(x509), 1);
+    X509_gmtime_adj(X509_get_notBefore(x509), 0); // not before current time
+    X509_gmtime_adj(X509_get_notAfter(x509), certificateData.endTime); // not after a year from this point
+    X509_set_pubkey(x509, pkey);
+    name = X509_get_subject_name(x509);
+    q_check_ptr(name);
+
+    unsigned char *C = reinterpret_cast<unsigned char *>(certificateData.country.toLatin1().data());
+    X509_NAME_add_entry_by_txt(name, "C", MBSTRING_ASC, C, -1, -1, 0);
+
+    unsigned char *O = reinterpret_cast<unsigned char *>(certificateData.organization.toLatin1().data());
+    X509_NAME_add_entry_by_txt(name, "O", MBSTRING_ASC, O, -1, -1, 0);
+
+    unsigned char *CN = reinterpret_cast<unsigned char *>(certificateData.commonName.toLatin1().data());
+    X509_NAME_add_entry_by_txt(name, "CN", MBSTRING_ASC, CN, -1, -1, 0);
+
+    X509_set_issuer_name(x509, name);
+    X509_sign(x509, pkey, EVP_sha256());
+
+    result.key = QSslKey(EasySSLUtils::extractPrivateKey(pkey), keyGenerator()->keyAlgorithm());
+    if(result.key.isNull()) {
+        EVP_PKEY_free(pkey);
+        X509_free(x509);
+        BIO_free_all(bp_public);
+        BIO_free_all(bp_private);
+        qCritical("Failed to generate a random private key");
+        return {};
+    }
+    EVP_PKEY_free(pkey);
+    BIO_free_all(bp_private);
+
+    BIO * bp_public = BIO_new(BIO_s_mem());
+    q_check_ptr(bp_public);
+    if(PEM_write_bio_X509(bp_public, x509) != 1){
+        X509_free(x509);
+        BIO_free_all(bp_public);
+        qCritical("PEM_write_bio_PrivateKey");
+        return {};
+    }
+
+    result.crt = QSslCertificate(EasySSLUtils::bioToByteArray(bp_public));
+    if(result.crt.isNull()) {
+        X509_free(x509);
+        BIO_free_all(bp_public);
+        qCritical("Failed to generate a random client certificate");
+        return {};
+    }
+
+    X509_free(x509);
+    BIO_free_all(bp_public);
+
+    return result;
+}
 
 }
diff --git a/src/lib/src/public/easyssl/x509.h b/src/lib/src/public/easyssl/x509.h
index 11fad76..737df3c 100644
--- a/src/lib/src/public/easyssl/x509.h
+++ b/src/lib/src/public/easyssl/x509.h
@@ -1,11 +1,31 @@
+//#
+//# Copyright (C) 2021-2023 QuasarApp.
+//# Distributed under the GPLv3 software license, see the accompanying
+//# Everyone is permitted to copy and distribute verbatim copies
+//# of this license document, but changing it is not allowed.
+//#
+
 #ifndef X509_H
 #define X509_H
 
+#include "global.h"
+#include "icertificate.h"
+#include "icrypto.h"
 
-class X509
+namespace EasySSL {
+
+/**
+ * @brief The X509 class This is wrapper of the ssl objects.
+ */
+class EASYSSL_EXPORT X509: public ICertificate
 {
 public:
-    X509();
+    X509(const QSharedPointer<ICrypto>& generator);
+
+    // ICertificate interface
+public:
+    SelfSignedSertificate create(const SslSrtData& certificateData) const override;
 };
 
+}
 #endif // X509_H