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SSL certificate to keep your site secure

SSL coupon

This is a discount voucher that can be used when applying for an SSL server certificate.

As an agent of our affiliated certificate authorities, we sell discount coupons for SSL server certificates, and we offer them at a discount price compared to the list price.
The coupon can be used when applying for an SSL certificate (new or renewed).

ネットのセキュリティもGMO

December 2025 ~ DigiCert has started selling multi-year plans.

2025年12月～　デジサート社複数年プランの販売を開始しました

デジサート社複数年プランとは

SSL/TLSサーバ証明書の購入と更新の手順をより簡単に管理することができる1年単位、最大3年間のサービス利用期間をご提供するプランです。
プランのご利用期間内であれば、証明書更新毎のお支払い処理の煩わしさなしに、SSL/TLSサーバ証明書の有効期間を自由に調整し、またFQDNを変更して証明書を取得することができます。

※ご契約期間中であれば、無料で何度でも証明書を発行することができます。
※証明書有効期限に応じて更新作業が必要になります。

プランの契約期間と証明書の有効期限
NEW! March 10, 2026 ~ DigiCert Product Price Change

March 10, 2026 ~ DigiCert products will be pricing.
We will inform you of the price of the product as soon as it is decided.

【重要】 ※SSLサーバ証明書 最大有効期間の短縮について

Three important points to check when purchasing SSL from an agency

  1. POINT 1

    Cheapness

    How much is the coupon being sold discounted compared to the original price?

    There are many sites that sell SSL coupons. Among them, it can be said that the high discount rate is an important point.

  2. POINT 2

    quality

    The company that sells the SSL coupon is an authorized distributor in Japan.

    If you are not an authorized distributor in Japan, you may not be able to receive appropriate support from the SSL issuing company, or you may not be able to support Japanese.

  3. POINT 3

    speed

    After applying, will the SSL coupon be delivered quickly?

    By shortening the time it takes to issue SSL coupons, you can reduce the time lag until you set up an SSL certificate.

What is SSL

It is a technology that encrypts the information passed over the Internet and realizes secure communication.

By encrypting the data, it prevents the leakage of important personal information such as the card number and password entered during online shopping.
Even if a malicious third party can intercept the data, it cannot be decrypted because it is converted by encryption.

SSL is an abbreviation for Secure Socket Layer, a protocol developed by Netscape in the United States that allows information to be encrypted and sent and received on the Internet.
The feature is that highly confidential information such as credit card information can be safely exchanged between the server and the client PC.

By introducing SSL to your site, you can eliminate the security concerns of visitors and buyers.

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For example, customers who shop on the Internet (online shopping) have these concerns.

  • Isn't it possible that the personal information entered in the entry form will be intercepted by a third party ...
  • The credit card number used to purchase the product may be leaked...

By introducing SSL certificates, these concerns are eliminated collectively.

Even if it is eavesdropped or intercepted by a third party, the information is encrypted, so the contents cannot be analyzed.

Implement SSL to create a secure online store environment.

What is an SSL server certificate?

A protocol that allows you to encrypt and send and receive information on the Internet.

Highly confidential information such as personal information and credit card information can be safely exchanged between the server and client PC.
By introducing SSL, you can prevent four risks such as "spoofing", "tampering", "subsequent denial", and "eavesdropping".
In particular, the SSL certificate for corporate existence authentication can confirm the information and existence of the site operating organization in addition to domain authentication, so you can use the site with more peace of mind.

An SSL server certificate is an electronic certificate that contains an electronic key for encryption, information about the owner, and signature data by the certificate issuer (certificate authority).

These have two roles:

  1. Proof that you own the domain as shown in the certificate
  2. Realization of SSL encrypted communication between the browser and the web server

SSL server certificate issuance flow

By purchasing from the application form on this site, coupons can be issued on the same day at the earliest.
SSL certificates are introduced to websites where you enter personal information, card numbers, and other information that you don't want others to know, and it protects information that can cause serious damage if misused by a third party. For the safety of the site, please use the SSL coupon.

  1. Fill in the required information from the application form.
  2. We will email you a invoice
  3. invoice Deposit to the listed bank transfer address
    * If you would like to use invoice buy now pay later, please contact us separately.
  4. After payment is confirmed, the management screen will be sent on the same day.
    We will send you the coupon and the URL of the application management screen by e-mail.
    (If it is past business hours, the next business day)
  5. It is now possible to obtain an SSL server certificate from the management screen.
    * You will be responsible for applying for and obtaining certificates on the management screen.