diff --git a/gui/qt/main_window.py b/gui/qt/main_window.py
index df85a19d..85223d9a 100644
--- a/gui/qt/main_window.py
+++ b/gui/qt/main_window.py
@@ -2915,16 +2915,3 @@ class ElectrumWindow(QMainWindow):
         text.setText(mpk_text)
         vbox.addLayout(Buttons(CloseButton(d)))
         d.exec_()
-
-    @protected
-    def create_csr(self, alias, challenge, password):
-        from electrum import x509
-        import tlslite
-        xprv = self.wallet.get_master_private_key(self.wallet.root_name, password)
-        _, _, _, c, k = bitcoin.deserialize_xkey(xprv)
-        csr = x509.create_csr(alias, challenge, k)
-        csr = tlslite.utils.pem.pem(bytearray(csr), "CERTIFICATE REQUEST")
-        with open('test.csr', 'w') as f:
-            f.write(csr)
-        #os.system('openssl asn1parse -i -in test.csr')
-        return 'test.csr'
diff --git a/lib/x509.py b/lib/x509.py
index 3f722a16..11716022 100644
--- a/lib/x509.py
+++ b/lib/x509.py
@@ -190,68 +190,3 @@ def load_certificates(ca_path):
         ca_keyID[x.get_keyID()] = fp
 
     return ca_list, ca_keyID
-
-
-def int_to_bytestr(i):
-    s = chr(i % 256)
-    while i > 256:
-        i >>= 8
-        s = chr(i % 256) + s
-    return s
-
-def create_csr(commonName, challenge, k):
-    from bitcoin import point_to_ser
-    private_key = ecdsa.SigningKey.from_string(k, curve = ecdsa.SECP256k1)
-    public_key = private_key.get_verifying_key()
-    pubkey = point_to_ser(public_key.pubkey.point, False)
-    asn1_type_table = {
-	'BOOLEAN':           0x01,	'INTEGER':           0x02,
-	'BIT STRING':        0x03,	'OCTET STRING':      0x04,
-	'NULL':              0x05,	'OBJECT IDENTIFIER': 0x06,
-	'SEQUENCE':          0x30,	'SET':               0x31,
-	'PrintableString':   0x13,	'IA5String':         0x16,
-	'UTCTime':           0x17,	'ENUMERATED':        0x0A,
-	'UTF8String':        0x0C,	'PrintableString':   0x13,
-    }
-    def x(t, s):
-        c = asn1_type_table[t] & 0x3f if type(t) == str else t
-        l = len(s)
-        if l < 128:
-            ls = chr(l)
-        else:
-            n = int_to_bytestr(l)
-            ls = chr(len(n) + 128) + n
-        return chr(c) + ls + s
-    x_int = lambda i: x('INTEGER', int_to_bytestr(i))
-    x_seq = lambda *items: x('SEQUENCE', ''.join(items))
-    x_bitstring = lambda s: x('BIT STRING', s)
-    x_utf8 = lambda s: x('UTF8String', s)
-    x_set = lambda *items: x('SET', ''.join(items))
-    x_printable = lambda s: x('PrintableString', s)
-    x_obj = lambda oid: x('OBJECT IDENTIFIER', encode_OID(oid))
-    body = x_seq(
-        x_int(0),
-        x_seq(
-            x_set(x_seq(x_obj('2.5.4.3'), x_utf8(commonName)))
-        ),
-        x_seq(
-            x_seq(
-                x_obj('1.2.840.10045.2.1'),
-                x_obj('1.3.132.0.10')
-            ),
-            x_bitstring(chr(0) + pubkey)
-        ),
-        x(0xa0, x_seq(x_obj('1.2.840.113549.1.9.7'), x_set(x_utf8(challenge)))
-        )
-    )
-    signature = private_key.sign_deterministic(body, hashfunc=hashlib.sha256, sigencode = ecdsa.util.sigencode_der)
-    assert public_key.verify(signature, body, hashfunc=hashlib.sha256, sigdecode = ecdsa.util.sigdecode_der)
-    csr = x_seq(
-        body,
-        x_seq(x_obj(ALGO_ECDSA_SHA256)),
-        x_bitstring(chr(0) + signature)
-    )
-    return csr
-
-
-