LINE Engineering

  • LINE and Intertrust Security Summit 2017 Spring, Tokyo 1
    Naohisa Ichihara 2017.08.18

    Hello, this is Ichihara from the LINE security team. I am in charge of security consultation for LINE services, providing countermeasures for account hacking and abusing, researching authentication technology, and engaging in standardization activities.

    Today, I would like to share with you an event titled, "LINE and Intertrust Security Summit 2017 Spring, Tokyo", co-hosted by LINE and Intertrust on May 17. I will cover this event over two posts; this is the first part of the recap. Have a look at the second part from here

    Here is a few basic information of the event.

    Security Intertrust

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  • Results From First half of 2017 LINE Security Bug Bounty Program
    Lee Myeongjae 2017.08.07

    He is a security engineer at LINE.

    Scope Expansion

    Hi you all, this is MJ (Myoungjae Lee), in charge of security at LINE. I am back with a report on running the LINE Security Bug Bounty Program for the first half of 2017. For those of you who are new to this program, the purpose of this program is to provide LINE users the most secure service possible by letting external security researchers submit bug (vulnerability) reports which we would then immediately fix. Since our official launch of the program on June 2, 2016, we have expanded the program scope to include the following:

    • LINE: Chrome version and Windows 10 Mobile version
    • For those of you who are interested, check the press release on the program scope expansion.

    LINE-Bug-Bounty Bug-Bounty

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  • Why we use Kotlin in LINE Creators Studio
    Freddie Wang 2017.07.20

    Currently working on Android development in LINE Fukuoka. I'm a zealous user of Kotlin.

    Before we begin

    Hi everyone, I am Freddie Wang from LINE Fukuoka's development team. I'm currently in charge of developing a new Android app called LINE Creators Studio. LINE Creators Studio is a sticker creation tool that lets anyone create his or her own stickers and sell them on LINE Store.

    In this blog, I'd like to talk about Kotlin, the programming language which the LINE Creators Studio app is built on. I will explain why we chose Kotlin as our main language and introduce some of the Kotlin features we are using.

    Note: LINE Creators Studio is currently available in Japan only. It will be released to other regions soon.

    Advantages and key features of Kotlin

    Why Kotlin?

    At Google I/O 2017, Google announced that Kotlin is now officially supported in Android Studio 3.0. When we kicked off the development project for LINE Creators Studio at the end of 2016, we were tasked with the challenge of growing it into an MVP (Minimum Viable Product) project in a very short time. Although Kotlin 1.0 had been released quite some time ago, no one in our team had the experience of using Kotlin. We spent some time to conduct a survey on Kotlin before starting the development and eventually decided to use Kotlin because of the benefits it provides as described below.

    100% interoperable with Java

    The most appealing aspect of Kotlin is that you can mix Kotlin code and Java code in the same project and continue to use all existing Java libraries. Although we don’t have any legacy Java code in our project, we wanted to use some awesome libraries such as Dagger 2, Retrofit, and RxJava.

    Concise syntax

    Kotlin is designed for solving problems. One of its main goals is to write clean code more easily than Java. This is the first and foremost essential factor for us when developing Android applications.

    Reduced dependencies

    Kotlin has a compact runtime library which can replace some large Java libraries such as Guava. Using large libraries may not be a problem in server or desktop environments but it can be problematic in Android. Because the Android environment puts 65K methods limit on Android apps, we should avoid using large Java libraries. Kotlin's stdlib library (version 1.1.3-2) has only 6306 methods, which means it has less impact than the Guava libraries in terms of the number of methods.

    Compatible with old Android devices

    Kotlin 1.0 is based on Java 6, which means it can support Android devices whose version is 2.3 or higher. This is another very important factor for Android developers.

    Kotlin Android Programming language

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  • BigDB - an ad data pipeline for LINE
    Jongkyu Lim, Joonghoon Shin 2017.07.12

    Jongkyu Lim: Jongkyu Lim is responsible for processing ads data. Joonghoon Shin: Joonghoon Shin develops ads data platform in LINE.

    Before we begin

    Hello, we are Jongkyu Lim and Joonghoon Shin responsible for processing of ads data and development of ads platform in LINE. In this blog post, I'd like to talk about BigDB: a big data processing pipeline for LINE ads. I'll go into detail about how BigDB came to be, what BigDB is, how it's structured, what it does, and what use cases it has.

    How BigDB came to be

    As we gather data from various services that are growing in size, the size of the data grows larger as well, making it difficult to properly use them for analysis. Up until now, we've used several open solutions that support big data to tackle this problem. While using several of these open solutions that have different strengths and weaknesses, we felt the need for a more simple and standardized way to collect, process, and look up data. And that is where the idea for BigDB began. Below are some of the key features we had in mind for BigDB.

    Introducing BigDB

    What is BigDB

    BigDB is a big data processing pipeline for LINE ads. It can collect, reprocess, and look up data. LINE ads are analyzed in two ways: The first is in real-time whenever an ad is shown to a user. The second is batch analysis, where events are collected and analyzed after a set time, such as hourly or daily. BigDB fluidly provides the data used for analysis. Sometimes combining time series and static data if necessary.

    Big-Database Big-DB Data-pipeline

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  • Geo-linked applications with beacon
    Charlotte Yu 2017.07.10

    In charge of business development and planning of the LINE Beacon platform (Messaging API, LINE Beacon, Customer Connect).

    Hello, my name is Charlotte Yu and I am currently in charge of the business development and planning of the LINE Beacon platform in Taiwan.

    One of the projects I'm working on involves using LINE Beacon as a feasible location contextual technology which can play an important role in LINE’s "Smart Portal" concept to bring people, information and services closer together and march toward our mission of "CLOSING THE DISTANCE".

    Currently, at this early stage, we are focusing on creating successful beacon deployments and use cases to raise user awareness and usage rates.

    Our strategy behind the LINE Beacon platform is to take advantage of LINE’s extensive user base and other LINE services and features popular in Taiwan. We believe that location-awareness will be a driving force in the advancement of mobile technology, and that's why we are building a beacon network by deploying LINE Beacon to as many places as possible. This is in line with two key factors of the online-to-offline (O2O) ecosystem: geo-linked applications using location-aware technology and platforms with a high user base.

    O2O messaging is used to connect the online digital platform to offline merchants. In terms of commerce, the aim of O2O is to drive customers from the online marketplace and platforms (where they spend most of their time) to offline brick-and-mortar stores. This can happen through digital coupons, membership cards, and proximity marketing. That's why we designed various beacon applications to build online-to-offline networks where the virtual world expands to the real world.

    O2O and beacons link everyday products and features such as LINE Coupon, LINE Points, and LINE Shop Card to drive sales. We can push GeoADs (geo-linked advertisements) to promote stores, clients, and events with LINE business accounts (such as official accounts or LINE@ accounts) to nearby LINE users. By encouraging LINE users to walk into stores using LBS (location-based service) incentives such as coupons and stickers, we can enhance the user experience and help LINE@ owners, who have an LBS add-on such as indoor navigation or a shopping guide, achieve higher user retention rates.

    Beacon Bot o2o

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