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The computational resources of IT4I are allocated by the Allocation Committee to a [Project](/), investigated by a Primary Investigator. By allocating the computational resources, the Allocation Committee is authorizing the PI to access and use the clusters. The PI may decide to authorize a number of her/his Collaborators to access and use the clusters, to consume the resources allocated to her/his Project. These collaborators will be associated to the Project. The Figure below is depicting the authorization chain:
You need to either [become the PI](../applying-for-resources/) or [be named as a collaborator](obtaining-login-credentials/#authorization-by-web) by a PI in order to access and use the clusters.
Head of Supercomputing Services acts as a PI of a project DD-13-5. Joining this project, you may **access and explore the clusters**, use software, development environment and computers via the qexp and qfree queues. You may use these resources for own education/research, no paperwork is required. All IT4I employees may contact the Head of Supercomputing Services in order to obtain **free access to the clusters**.
The PI is authorized to use the clusters by the allocation decision issued by the Allocation Committee.The PI will be informed by IT4I about the Allocation Committee decision.
**Only** for those who already have their IT4I HPC account. This is a preferred way of granting access to project resources. Please, use this method whenever it's possible.
This is a preferred way of granting access to project resources. Please, use this method whenever it's possible.
Log in to the [IT4I Extranet portal](https://extranet.it4i.cz) using IT4I credentials and go to the **Projects** section.
* **Users:** Please, submit your requests for becoming a project member.
* **Primary Investigators:** Please, approve or deny users' requests in the same section.
In order to authorize a Collaborator to utilize the allocated resources, the PI should contact the [IT4I support](https://support.it4i.cz/rt/) (E-mail: [support\[at\]it4i.cz](mailto:support@it4i.cz)) and provide following information:
1. Identify your project by project ID
1. Provide list of people, including himself, who are authorized to use the resources allocated to the project. The list must include full name, e-mail and affiliation. Provide usernames as well, if collaborator login access already exists on the IT4I systems.
1. Include "Authorization to IT4Innovations" into the subject line.
!!! warning
Should the above information be provided by e-mail, the e-mail **must be** digitally signed. Read more on [digital signatures](#certificates-for-digital-signatures) below.
Example (except the subject line which must be in English, you may use Czech or Slovak language for communication with us):
Subject: Authorization to IT4Innovations
Dear support,
Please include my collaborators to project OPEN-0-0.
John Smith, john.smith@myemail.com, Department of Chemistry, MIT, US
Jonas Johansson, jjohansson@otheremail.se, Department of Physics, Royal Institute of Technology, Sweden
Luisa Fibonacci, lf@emailitalia.it, Department of Mathematics, National Research Council, Italy
Thank you,
PI
(Digitally signed)
Once authorized by PI, every person (PI or Collaborator) wishing to access the clusters, should contact the [IT4I support](https://support.it4i.cz/rt/) (E-mail: [support\[at\]it4i.cz](mailto:support@it4i.cz)) providing following information:
1. Project ID
1. Full name and affiliation
1. Statement that you have read and accepted the [Acceptable use policy document](http://www.it4i.cz/acceptable-use-policy.pdf) (AUP).
1. Attach the AUP file.
1. Your preferred username, max 8 characters long. The preferred username must associate your surname and name or be otherwise derived from it. Only alphanumeric sequences, dash and underscore signs are allowed.
1. In case you choose [Alternative way to personal certificate](#alternative-way-to-personal-certificate), a **scan of photo ID** (personal ID or passport or driver license) is required
!!! warning
Should the above information be provided by e-mail, the e-mail **must be** digitally signed. Read more on [digital signatures](#certificates-for-digital-signatures) below.
Example (except the subject line which must be in English, you may use Czech or Slovak language for communication with us):
```bash
Subject: Access to IT4Innovations
Dear support,
Please open the user account for me and attach the account to OPEN-0-0
Name and affiliation: John Smith, john.smith@myemail.com, Department of Chemistry, MIT, US
I have read and accept the Acceptable use policy document (attached)
Preferred username: johnsm
Thank you,
John Smith
(Digitally signed)
You will receive your personal login credentials by protected e-mail. The login credentials include:
1. username
1. ssh private key and private key passphrase
1. system password
The clusters are accessed by the [private key](../accessing-the-clusters/shell-access-and-data-transfer/ssh-keys/) and username. Username and password is used for login to the [information systems](http://support.it4i.cz/).
On Windows, use [PuTTY Key Generator](../accessing-the-clusters/shell-access-and-data-transfer/putty/#putty-key-generator).
Change password in [your user profile](https://extranet.it4i.cz/user/).
We accept personal certificates issued by any widely respected certification authority (CA). This includes certificates by CAs organized in [International Grid Trust Federation](http://www.igtf.net/), its European branch [EUGridPMA](https://www.eugridpma.org/) and its member organizations, e.g. the [CESNET certification authority](https://tcs.cesnet.cz). The Czech _"Qualified certificate" (Kvalifikovaný certifikát)_ provided by [PostSignum](http://www.postsignum.cz/) or [I.CA](http://www.ica.cz/Kvalifikovany-certifikat.aspx), that is used in electronic contact with Czech authorities is accepted as well.
Certificate generation process for academic purposes, utilizing the CESNET certification authority, is well-described here:
* [How to generate a personal TCS certificate in Mozilla Firefox web browser (in Czech)](http://idoc.vsb.cz/xwiki/wiki/infra/view/uzivatel/moz-cert-gen)
If you are not able to obtain certificate from any of the respected certification authorities, please follow the Alternative Way bellow.
A FAQ about certificates can be found here: [Certificates FAQ](certificates-faq/).
Follow these steps **only** if you can not obtain your certificate in a standard way. In case you choose this procedure, please attach a **scan of photo ID** (personal ID or passport or drivers license) when applying for login credentials.
!!! warning
Please use Firefox (clone) for following steps. Other browsers, like Chrome, are not compatible.
* Go to [COMODO Application for Secure Email Certificate](https://secure.comodo.com/products/frontpage?area=SecureEmailCertificate).
* Fill in the form, accept the Subscriber Agreement and submit it by the _Next_ button.
* Type in the e-mail address, which you intend to use for communication with us.
* Don't forget your chosen _Revocation password_.
* You will receive an e-mail with link to collect your certificate. Be sure to open the link in the same browser, in which you submited the application.
* Your browser should notify you, that the certificate has been correctly installed in it. Now you will need to save it as a file.
* Now in Firefox navigate to _Options > Advanced > Certificates > View Certificates_.
* In the _Your Certificates_ tab, find the fresh certificate with today's date.
* Select it and hit the _Backup..._ button
* Standard save dialog should appear, where you can choose tha name of your certificate file for your easy identification in the future.
* You will be prompted to choose a passphrase for yor new certificate. This passphrase will be needed for installation into your favourite email client.
!!! note
Certificate file now can be installed into your email client. Web-based email interfaces cannot be used for secure communication, externall application, such as Thunderbird or Outlook must be used (instructions bellow).
* [How to Remove, Import, and Export Digital certificates](http://support.microsoft.com/kb/179380)
* [Importing a PKCS #12 certificate (in Czech)](http://idoc.vsb.cz/xwiki/wiki/infra/view/uzivatel/outl-cert-imp)
* [Installing an SMIME certificate](https://support.globalsign.com/customer/portal/articles/1214955-install-certificate---mozilla-thunderbird)
* [Importing a PKCS #12 certificate (in Czech)](http://idoc.vsb.cz/xwiki/wiki/infra/view/uzivatel/moz-cert-imp)
User accounts are supported by membership in active Project(s) or by affiliation to IT4Innovations. User accounts, that loose the support (meaning, are not attached to an active project and are not affiliated with IT4I), will be deleted 1 year after the last project to which they were attached expires.
User will get 3 automatically generated warning e-mail messages of the pending removal:.
* First message will be sent 3 months before the removal
* Second message will be sent 1 month before the removal
* Third message will be sent 1 week before the removal.
The messages will inform about the projected removal date and will challenge the user to migrate her/his data