this.decrypt = function(data, password, pbkdf2_iterations, success, error) {
        //iso10126 with pbkdf2_iterations iterations
        try {
            var decoded = Crypto.AES.decrypt(data, password, { mode: new Crypto.mode.CBC(Crypto.pad.iso10126), iterations : pbkdf2_iterations});

            if (decoded != null && decoded.length > 0) {
                if (success(decoded)) {
                    return decoded;
                };
            };
        } catch (e) {
            console.log(e);
        }

        //iso10126 with 10 iterations  (old default)
        if (pbkdf2_iterations != 10) {
            try {
                var decoded = Crypto.AES.decrypt(data, password, { mode: new Crypto.mode.CBC(Crypto.pad.iso10126), iterations : 10 });

                if (decoded != null && decoded.length > 0) {
                    if (success(decoded)) {
                        return decoded;
                    };
                };
            } catch (e) {
                console.log(e);
            }
        }

        //Otherwise try the old default settings
        try {
            var decoded = Crypto.AES.decrypt(data, password);

            if (decoded != null && decoded.length > 0) {
                if (success(decoded)) {
                    return decoded;
                };
            };
        } catch (e) {
            console.log(e);
        }

        //OFB iso7816 padding with one iteration (old default)
        try {
            var decoded = Crypto.AES.decrypt(data, password, {mode: new Crypto.mode.OFB(Crypto.pad.iso7816), iterations : 1});

            if (decoded != null && decoded.length > 0) {
                if (success(decoded)) {
                    return decoded;
                };
            };
        } catch (e) {
            console.log(e);
        }

        //iso10126 padding with one iteration (old default)
        try {
            var decoded = Crypto.AES.decrypt(data, password, { mode: new Crypto.mode.CBC(Crypto.pad.iso10126), iterations : 1 });

            if (decoded != null && decoded.length > 0) {
                if (success(decoded)) {
                    return decoded;
                };
            };
        } catch (e) {
            console.log(e);
        }

        if (error) error();

        return null;
    }