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Warning: Changing to SHA–2 certificates and the end of support for SSL 3.0 communication encryption

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About the change to SHA–2 certificates

As the Mizuho Financial Group is tightening security, server certificates will change from SHA–1 to SHA–2*. After server certificates are changed, you will no longer be able to use the service from an environment that does not support SHA–2. Therefore, please take necessary action, such as by upgrading your computer's OS and browsers.

  • *What is SHA–2?
    SHA–2 is the name of an algorithm used to encrypt communications. Security is improved compared to SHA–1.

When will the change to SHA–2 occur?

Between Wednesday, May 18, 2016 and Thursday, May 19, 2016 (Japan time)
Please be advised the schedule is subject to change due to the status of the operation.

Environments that can no longer be used

Computers

The main computer environments that cannot use SHA–2 are as follows.
OS Windows XP SP2 and earlier, Mac OS X 10.4 and earlier
Browsers Internet Explorer 6.0 (Windows XP SP2) and earlier browsers, Safari 3 (Mac OS X 10.4) and earlier browsers, Google Chrome 1 to 37 (some OSs that include Windows XP SP2)
  • *If you can correctly access the test page, no errors or security warnings will be displayed, and the message [This page is for TEST SHA256 SSL Certificate.] will appear, indicating that your environment supports SHA–2.
    If there is a connection error, an error or security warning will appear, indicating that your environment does not support SHA–2.
    The content that is displayed depends on the browser that you are using.

About the end of support for SSL 3.0 communication encryption

As the Mizuho Financial Group is tightening security, connections using SSL 3.0 communication encryption, which has been reported to have a vulnerability, will be terminated.
After the termination of SSL 3.0, use of the service from environments that do not support TLS 1.0 or above (the successor to SSL 3.0) will no longer be possible.

When will support for SSL 3.0 end?

Between Wednesday, May 18, 2016 and Thursday, May 19, 2016 (Japan time)
Please be advised the schedule is subject to change due to the status of the operation.

Environments that can no longer be used

  • Those that use Internet Explorer 6 or earlier browsers
  • Those that have TLS set to OFF due to browser security settings

Changing settings

For Internet Explorer

Follow the procedure below to enable TLS 1.0, TLS 1.1, and TLS 1.2.
TLS is enabled by default in Internet Explorer 7 and later, thus unless you have changed the settings, you can connect via TLS. It is also recommended that you disable SSL 3.0, in order to further tighten security.

  • On the Internet Explorer [Tools] menu, click [Internet Options].
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  • On the [Internet Options] dialog box, click the [Advanced] tab.
  • Under the [Security] category, clear the [Use SSL 3.0] check box and select the [Use TLS 1.0], [Use TLS 1.1], and [Use TLS 1.2] check boxes.
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  • Click [OK].
  • Exit and then restart Internet Explorer.

Other browsers

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