SRP (Secure Reverse Proxy)
Students' Portal

Abstract of This Page

The SRP (Secure Reverse Proxy) is a user authentication system of the information services of Tohoku University which is mainly applied for off-campus access, and it is also a gateway to the portal site for students. This page provides basic information and instructions of the SRP authentication.

Contents
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1. Outline1.1 What is SRP? 1.2 Users 1.3 How to Use
2. SRP Authentication2.1 On-Campus Access 2.2 Off-Campus Access
3. Image-Matrix Authentication3.1 Overview 3.2 How to Do 3.3 Update/Confirmation of Your Secret Key
4. お問い合わせ

1. Outline
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1.1 What is SRP?

The SRP (Secure Reverse Proxy) is a user authentication system of the information services of Tohoku University which is mainly applied for off-campus access. It is also a gateway to the portal site for students which includes the hyperlinks to various information services of our university. The SRP authentication is required not only for off-campus access but on-campus access in several services.

The SRP authentication involves a special auxiliary authentication, what we call the "image-matrix" authentication, in order to achieve higher security level, in addition to the usual Tohokudai-ID/Password authentication.

1.2 Users

The SRP is provided for all students in Tohoku University, including undergraduate and graduate students. You are required no user registration in order to make use of the SRP service, but your Tohokudai-ID (and Password) is required.

You can visit the Students' Portal after the SRP authentication.

1.3 How to Use

The SRP is a web-based service. You can visit the SRP's login page by both on-campus and off-campus access.

2. SRP Authentication
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There are two instructions of the SRP authentication, one is for on-campus access and the other is for off-campus access.

2.1 On-Campus Access

2.2 Off-Campus Access

3. Image-Matrix Authentication
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3.1 Overview

The image-matrix authentication of the SRP is a secondary authentication introduced in purpose of achieving higher security level. This is required for off-campus access after doing the usual Tohokudai-ID/Password authentication.

3.2 How to Do

3.2.1 Confirmation of Your Secret Key

In the image-matrix authentication you have to apply a special secret key. This secret key is a chain of several image icons and its initial value is assigned for you by the system administrator at the time of your enrollment. To get the initial secret key of you, follow the instruction depicted in the image-matrix authentication page; scroll the screen of the image-matrix authentication page downward.

How to get the initial secret key for the image-matrix authentication

You can configure your secret key by yourself. The instruction for configuring/updating or confirming the secret key can be found in Section 3.3.

3.2.2 How to Do the Image-Matrix Authentication

Whenever you are requested to do the image-matrix authentication (after the usual Tohokudai-ID/Password authentication), you are invited to the authentication page as depicted in the picture below.

The image-matrix authentication

3.2.3 Remarks

3.3 Update/Confirmation of Your Secret Key

Here is an instruction for updating your secret key for the image-matrix authentication or confirming the current secret key. This instruction requires login to the Students' Portal Site, so you can follow this instruction only through on-campus access if you have forgotten your secret key for the image-matrix authentication.

4. Contact
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The contact address of the SRP is: