diff --git a/index.js b/index.js
index 82d1537..0065932 100644
--- a/index.js
+++ b/index.js
@@ -14,7 +14,8 @@ module.exports = {
     _getCharType: _getCharType,
     _getPasswordChar: _getPasswordChar,
     _createHmac: _createHmac,
-    _calcEntropy: v2.calcEntropy
+    _calcEntropy: v2.calcEntropy,
+    _getSetOfCharacters: v2.getSetOfCharacters,
 };
 
 function _encryptLogin(login, masterPassword, options) {
diff --git a/src/v2.js b/src/v2.js
index 13c59cc..ca099d7 100644
--- a/src/v2.js
+++ b/src/v2.js
@@ -15,4 +15,25 @@ exports.calcEntropy = function (site, login, masterPassword, passwordProfile) {
             }
         });
     })
+};
+
+exports.getSetOfCharacters = function (passwordProfile) {
+    var subsetOfCharacters = {
+        lowercase: 'abcdefghijklmnopqrstuvwxyz',
+        uppercase: 'ABCDEFGHIJKLMNOPQRSTUVWXYZ',
+        digits: '0123456789',
+        symbols: '!"#$%&\'()*+,-./:;<=>?@[\\]^_`{|}~'
+    };
+
+    if (typeof passwordProfile === 'undefined') {
+        return subsetOfCharacters.lowercase + subsetOfCharacters.uppercase + subsetOfCharacters.digits;
+    }
+
+    var setOfCharacters = '';
+    ['lowercase', 'uppercase', 'digits', 'symbols'].forEach(function (subset) {
+        if (passwordProfile.hasOwnProperty(subset) && passwordProfile[subset]) {
+            setOfCharacters += subsetOfCharacters[subset]
+        }
+    });
+    return setOfCharacters;
 };
\ No newline at end of file
diff --git a/tests/v2/setOfCharacters.tests.js b/tests/v2/setOfCharacters.tests.js
new file mode 100644
index 0000000..cb4b933
--- /dev/null
+++ b/tests/v2/setOfCharacters.tests.js
@@ -0,0 +1,52 @@
+var assert = chai.assert;
+
+describe('LessPass', function () {
+    describe('set of characters', function () {
+        it('get default set of characters', function () {
+            var setOfCharacters = LessPass._getSetOfCharacters();
+            assert.equal('abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789', setOfCharacters);
+            assert.equal(26 * 2 + 10, setOfCharacters.length);
+        });
+        it('get default set of characters with object', function () {
+            var setOfCharacters = LessPass._getSetOfCharacters({
+                lowercase: true,
+                uppercase: true,
+                digits: true,
+                symbols: false
+            });
+            assert.equal('abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789', setOfCharacters);
+            assert.equal(26 * 2 + 10, setOfCharacters.length);
+        });
+        it('get set of characters only lowercase', function () {
+            var setOfCharacters = LessPass._getSetOfCharacters({lowercase: true});
+            assert.equal('abcdefghijklmnopqrstuvwxyz', setOfCharacters);
+            assert.equal(26, setOfCharacters.length);
+        });
+        it('get set of characters only uppercase', function () {
+            var setOfCharacters = LessPass._getSetOfCharacters({uppercase: true});
+            assert.equal('ABCDEFGHIJKLMNOPQRSTUVWXYZ', setOfCharacters);
+            assert.equal(26, setOfCharacters.length);
+        });
+        it('get set of characters only digits', function () {
+            var setOfCharacters = LessPass._getSetOfCharacters({digits: true});
+            assert.equal('0123456789', setOfCharacters);
+            assert.equal(10, setOfCharacters.length);
+        });
+        it('get set of characters only symbols', function () {
+            var setOfCharacters = LessPass._getSetOfCharacters({symbols: true});
+            assert.equal('!"#$%&\'()*+,-./:;<=>?@[\\]^_`{|}~', setOfCharacters);
+            assert.equal(32, setOfCharacters.length);
+        });
+        it('get set of characters concat two subsets', function () {
+            var setOfCharacters = LessPass._getSetOfCharacters({lowercase: true, uppercase: true});
+            assert.equal('abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ', setOfCharacters);
+            assert.equal(26 * 2, setOfCharacters.length);
+        });
+        it('get set of characters doesn\'t care of key order in options', function () {
+            assert.equal(
+                LessPass._getSetOfCharacters({digits: true, symbols: true}),
+                LessPass._getSetOfCharacters({symbols: true, digits: true})
+            );
+        });
+    });
+});
\ No newline at end of file