CAS user account and password

There may be several reasons for why you cannot log into CAS — forgotten password, expired password, or a compromised account.

Recommended steps:

Try resetting your password online

• The fastest way is to visit password recovery portal.

• After verifying your identity (email, SMS, NIA), you can set a new password.

Visit a service office — if online recovery is not possible

• If online password recovery fails, visit CU card issuing center or an authorized faculty office.

• You will receive an initial password, which must be changed within 5 days.

Suspicion of account compromise

• If you suspect misuse (unusual activity, unknown logins), immediately contact the CU CSIRT team.

Important: Even after changing your password, your data may remain accessible on devices where you were previously logged in, so always report suspected incidents.

Try closing old browser sessions, clearing cache/cookies, or using another browser.

Use the Login issues form in ServiceDesk.

The first initial password to the Central Authentication Service (CAS) was assigned to you and issued when you issued your CU card or at your request (e.g. when losing your password or when replacing an unverified password), either by the CU card issuing centre or by authorized faculty office.

The initial password is used ONLY to set the password (so-called verified) to CAS. It cannot be used for logging into other CU information systems.

It is valid for 5 calendar days only. After the expiry of this period, it becomes null and void and cannot be extended or reused in any way.

• It is not necessary to visit the CU Card issuing centre to set a new password. You can change your password yourself after logging in.

  • Firstly, you must log in to CAS.

  • Use the university personal number (eight digits) under your photo on the CU card as your login name.

  • In the "Password" box, enter your initial password assigned by the CU Card issuing centre or by the authorised faculty office.

  • After logging in, go to the menu item on the left "Password for CAS" and select "Change the initial password".

  • Set your NEW - verified password here. The rules that a new password must comply with are always clearly listed here.

• If you do not know or have forgotten your password, follow the chapter "I forgot my password or it doesn't work"

The rules for creating a suitable password are directly defined after logging in to your CAS account (in the New Password setting step).

• Although the password is well thought out and strong, the longer it is used, the more likely it is to be broken through, which can lead to misuse of your account. It is therefore recommended to change your password regularly.

• Within the CAS access rules, this is once a year. You will be informed by email about the need to change your password in time (one month in advance). The email will also indicate the exact expiry date of your old password.

You can extend the validity of your password by changing your password. If your faculty policy allows it, you can reuse your original password as well.

• Be careful when entering your password and pay attention to your surroundings.

• Never share your password with others.

• Always log out when logging in on a public internet network.

• Remember your password, if you need to write it down, use applications designed for password management, e.g. Keepass etc.

• If you know your current password, it is not necessary to visit the CU Card Issuing Centre to change/get a new password. You can change your password yourself after logging in.

  • First, you must log in to your CAS account.

  • Use the university personal number (eight digits) under your photo on the CU card as your login name.

  • In the "Password" box, enter your current password, or the initial password assigned by the CU Card issuing centre or by the authorised faculty office.

  • After logging in, go to the menu item on the left "Password for CAS" and select "Change password for CAS".

  • Here you set your NEW (verified) password. The rules that the new password must comply with are always clearly listed here.

• If you don't know the password or have forgotten it, follow the section "Forgot my password or it doesn't work"

If you have an email address set up in your CAS account, you can reset your password.

• If you do not know the valid password, but you have a phone number set for your account, we will verify your identity by sending a check SMS message and you can set a new password.

• If you don't know the password and you don't have a set phone number, you must follow the same procedure as if you don't have a password at all - visit CU Card issuing centre or authorized faculty office.

You can also reset your CAS password using the Public Administration tool - NIA.

You can also reset your CAS password using the SvipeID tool.

If you have forgotten your password, follow the same procedure as if you don't have a password - visit CU Card issuing centre or authorized faculty office.

The verified password is the standard and recommended type of password for the CAS account. You get it after verifying your identity.

You can verify your identity in two ways:

• personal visit CU Card issuing centre or authorized faculty office and presenting a photo CU card,

• online through the portal for remote identity verification and using the NIA, or SvipeID.

A verified password allows you to use all university systems and services without restrictions.

An unverified password is a password with a lower level of trust. It only serves as a temporary and emergency solution if, for some reason, your identity cannot be verified in the standard way.

It can be obtained without a personal visit to the card issuing centre or ahtorized faculty office. You can set an unverified password online in two ways:

• in the CAS account via the password reset form, by sending an SMS and e-mail invitation to the contact details registered in CAS,

• in emergency cases using special methods available in the portal for remote identity verification (only if more trustworthy authentication methods fail).

When setting an unverified password, you are always reminded of this fact.

Important notice: An unverified password may restrict you from using certain university services. For example:

• login to all systems may not work,

• cannot set access to the eduroam network,

• it may not be possible to apply for a personal certificate,

• some faculties only require a verified password.

Therefore, use an unverified password only temporarily and set a verified password as soon as possible.

• eduroam network,

• domain JINONICE,

• LF computer network in Pilsen (STUDENTS domain),

• personal certificates TCS.