• Which Products are you interested in ?

    CST offers a wide range of EM simulation software to address design challenges across the electromagnetic spectrum, from static and low frequency to microwave and RF, for a range of applications, including EDA & electronics, EMC & EMI and charged particle dynamics.

  • Antenna Magus
  • IdEM
  • FEST3D
  • Optenni Lab
  • Looking for a Training, Workshop or eSeminar ?

    CST STUDIO SUITE® is being demonstrated at trade shows and workshops all over the world. Take a look at the list of conferences and exhibitions CST will be attending and get further information regarding CST workshops, eSeminars and training days.

  • TrainingsRegular training courses are held in CST's offices in Asia, Europe, and North America. Please check our trainings section for detail of trainings in all over the globe. Advance registration is normally required.

  • WorkshopsCST hosts workshops in multiple languages and in countries around the world. Workshops provide an opportunity to learn about specific applications and refresh your skills with experienced CST support staff. Make sure you visit our workshop section.

  • eSeminarsThroughout the year, CST simulation experts present eSeminars on the applications, features and usage of our software. You can also view past eSeminars by searching our archive and filtering for the markets or industries that interest you most.

  • Check our latest Events
  • Why create a MyCST Account ?

    A MyCST account may facilitate your access to many of the offerings on the CST website, for example the registration for eSeminars and the watching of eSeminars recordings, setting email preferences, and there is more functionality to come. It is required to participate in workshops and trainings.

  • Personal PreferencesAllows you to update your email preferences and areas of interest. It helps us to personalize your experience.

  • EventsSearch for events by location, industry and application. Once you are registered, you will be able to manage your registrations and check important details about your events. This section also provides you with a repository for Workshop & Training material.

  • LibraryYou can collect articles you find on the CST website to reference or read later by clicking on the “Add this article” button at the bottom of the article page.

  • Create Your Own Account
  • Need technical Support ?

    Customers can customize their accounts once they have completed the account creation process. This platform acts as vivid interface between CST and our customers.

    We therefore offer access to the latest Service Packs (including an automatic notification that a new Service Pack is available), a steadily growing database of Frequently Asked Questions (FAQs), Application Notes and Training Videos, as well as an individual FTP section for easy exchange of large files with our support team.

  • Do I need an Account?To access the Support Site a valid maintenance contract and a one-time registration is required.

    Please note that your Support login does not work for the MyCST account.

  • Get Support
  • How to request a Trial License ?

    Get your license in only three steps:

    1. Fill in the required fields in the contact form on the right and click "Send Us Your Request".

    2. Lean back and wait until one of our CST Experts contacts you.

    3. Enjoy a our trial license.

  • Student Edition

    Student Edition The CST STUDIO SUITE® Student Edition has been developed with the aim of introducing you to the world of electromagnetic simulation, making Maxwell’s equations easier to understand than ever. With this edition you have, bar some restrictions, access to our powerful visualization engine and some of the most advanced solvers of CST STUDIO SUITE.

    Student Edition

CST – Computer Simulation Technology

CST – Computer Simulation Technology GmbH, (hereinafter “CST”) processes Personal Data (as defined below) in the course of its business, including the Personal Data of people browsing the websites of CST (the "Sites").

The purpose of this “Privacy Policy” is to inform all individuals from whom Personal Data is collected by CST ("You" or "Your") how CST collects and uses such Personal Data and how You can control its use.


1. Scope of this privacy policy

This Privacy Policy sets forth the principles and guidelines governing the protection of Your Personal Data including the Personal Data collected on or through the Sites.

CST collects Personal Data either online (including via email) or offline and this Privacy Policy is applicable regardless of the means of collection or processing.

Personal data ("Personal Data") means any information relating to an identified or identifiable person. An identifiable person is a person who can be identified, directly or indirectly, in particular by reference to an identification number or to one or more factors specific to the person. Non-Personal Data means any information that does not result in the identification of a person.

For visitors and users of the Sites: each Site is subject to Terms of Use that can be found on each Site and are incorporated into this Privacy Policy. Your use of the Sites and any Personal Data You provide on the Sites are subject to the terms of this Privacy Policy and the applicable Terms of Use.


Data collected

a. Visitors

Visitors are individuals who visit the Sites without registering themselves. Their Personal Data likely includes:

  • IP and/or MAC address
  • Cookies (as described in section 10); and
  • any other Personal Data as may be relevant for the purposes listed below.


b. Users

Personal Data collected (including from those who visit Sites and enter information) for the purposes listed below likely includes:

  • title;
  • first and last name;
  • postal address;
  • email address;
  • telephone number(s);
  • login and password;
  • university, degree and courses taken;
  • type of organization (company, school, university, etc.), organization name, organization size, department and job title;
  • industry and industry sub-industry sectors;
  • people to whom purchases are shipped;
  • financial data (credit card number and expiry date, name and address of the cardholder);
  • IP and/or MAC address;
  • Cookies (as described in section 10); and
  • any other Personal Data as may be relevant for the purposes listed below.


In all cases, however, the Personal Data gathered is limited to data necessary for the purposes described in Article 4 below.

For visitors and users of the Sites: in order to use certain functions and features of the Site, CST requires that You provide certain Personal Data when visiting or using the Site. You are free to decide whether or not to provide all or part of Your Personal Data. However, if You choose not to provide all or part of this Personal Data, the purposes as described in Article 4 hereafter might not be achieved or not properly achieved, some areas and functions of the Sites may not function properly and/or You may be refused access to certain pages on the Site. In particular, You will not be authorized to purchase software licenses or other products or services via the Site.


Protection of personal data concerning children

For visitors and users of the Sites: in order to use certain functions and features of the Site, CST requires that You provide certain Personal Data when visiting or using the Site. You are free to decide whether or not to provide all or part of Your Personal Data. However, if You choose not to provide all or part of this Personal Data, the purposes as described in Article 4 hereafter might not be achieved or not properly achieved, some areas and functions of the Sites may not function properly and/or You may be refused access to certain pages on the Site. In particular, You will not be authorized to purchase software licenses or other products or services via the Site.

Certain CST products and services may be appropriate for use by children, however, in which case children below the age of consent under local data protection laws must seek consent from their parents or guardians prior to creating a CST account or registering a product. Teachers and school administrators may act in the place of parents and guardians and provide consent for the collection of Personal Data from children (schools should always ensure that they have received permission from parents or guardians to do so).

If parents or guardians become aware that their child has provided CST with Personal Data without their consent or without a teacher’s or school administrator’s consent, they can ask CST to remove such Personal Data and terminate the child’s account by sending an email to simulia.cst.web@3ds.com.

If CST becomes aware that it has collected Personal Data from a child below the age of consent under local data protection laws without consent from a parent or guardian, CST will take steps to seek the parent’s or guardian’s consent for that processing or to remove such Personal Data and terminate the child’s account.


Purposes and legal grounds for processing personal data

Whether You are a visitor or a user, CST collects Your Personal Data for the following legal grounds and for the following purposes:

  • Processing activities based on Your consent:
    • To improve Your user experience;
    • To recognize that You have given a Personal Data so You don't need to do it for every web page requested;
  • Processing activities based on CST’s legitimate interest:
    • To enable CST to manage surveys.


In addition, when You are a user, CST collects Your Personal Data on the following legal grounds and for the following purposes:

  • Processing activities based on Your prior consent:
    • To enable You to request and receive information on CST and CST products and services from CST or a third party engaged by CST;
    • To ascertain Your requirements and interests and provide You with the most suitable products and/or services ;
    • To enable CST to manage its marketing activities;
    • To enable You to register for a seminar, webinar, or event;
    • To enable You to enter a contest;
    • To enable You to create a user profile (“3DPassport”). CST provides You with the possibility of using its Sites (including forums, blogs, and networks), and CST products and services that require You to register and create a 3DPassport. User profiles provide the option to display personal information about You to other users, including but not limited to Your name, photo, social media accounts, postal or email address, or both, telephone number, personal interests, skills, and basic information about Your company. These profiles may relate to a single Site or may also allow You to access CST products and services, or both.


CST may provide a hashed user ID to third party operated social networks or other web offerings (such as Twitter, LinkedIn, Facebook, Instagram, or Google) where this information is matched against the social networks’ data own data bases in order to display to You more relevant information.

  • Processing based on CST’s legitimate interest:
    • To enable CST to manage its marketing activities for similar goods and products if You are already using CST products and services;
    • To manage the CST obligations related to applicable export laws, trade sanctions, and embargoes issued, without limitation, by the European Union and its member states, and of the United States of America. This may include (i) automated checks of any user registration data as set out herein and other information You provide about Your identity against applicable sanctioned-party lists; (ii) regular repetition of such checks whenever a sanctioned-party list is updated or when You update Your information; (iii) blocking of access to CST services and systems in case of a potential match; and (iv) contacting You to confirm Your identity in case of a potential match;
    • To manage the CST License Compliance program.
  • Processing based on the performance of a contract :
    • To provide You with a personalized interactive use of the Sites;
    • To allow You to open and maintain an account in order to obtain specialized documentation and technical assistance;
    • To access all the features and options offered by the Sites;
    • To enable You to exchange with other users of the Sites;
    • To enable CST to manage its business relationships, including sales opportunities, commercial offers, purchasing, contracts, orders, invoices, which may include conversational data triggered via chat functionalities on the Sites, contact forms, emails, and voice messaging data;
    • To provide You with commercial or support-type services;
    • To enable You to purchase software licenses, or products or services, download software and/or register software licenses; and
    • To manage Your training and/or certification on CST products and services. CST may also track users’ learning progress in order to make this information available to them.

Generally, when consent is not required, You cannot opt out of non-marketing related communications that are required for the relevant business relationship. With regard to marketing-related communications (e.g., emails and phone calls), CST will (i) where legally required, only send You such communications after You have opted in, and (ii) provide You the opportunity to opt out of receiving further marketing-related communications from CST.

When You register for an event organized by CST, CST may share Your name, company, and email address with other participants and sponsors of the same event for the purpose of communication and the exchange of ideas. In addition, CST may ask You for information about Your health for the sole purpose of identifying and being considerate of individuals who have disabilities or special dietary requirements throughout the event.

Subject to applicable local law, by providing Personal Data such as but not limited to e-mail address, You hereby expressly authorize CST and its affiliates and subsidiaries (“CST Group Companies”) to use it together with other relevant Personal Data to send You commercial or marketing communications. CST might also use Your email address for administrative or other non-marketing purposes (for example, to notify You of significant changes to the Sites).


Personal data retention period

CST does not store Your Personal Data for more time than necessary. Retention periods may vary depending on the data categories and the processing activities.

Where CST is processing and using Your Personal Data as permitted by law or under Your consent, CST will store Your Personal Data (i) only as long as required to fulfill the purposes set out above, (ii) where CST has a legitimate interest in using Your Personal Data, until You object to CST’s use of Your Personal Data, or (iii) where You gave Your consent, until You withdraw it. However, where CST is required by applicable law to retain Your Personal Data longer or where Your Personal Data is required to assert or defend against legal claims, CST will retain Your Personal Data until the end of the relevant retention period or until the claims in question have been settled


Transfer of personal data

If You are accessing the Sites from a location outside of the European Union, with laws or regulations governing data collection, use, and disclosure that differ from those of the European Union, please note that through Your continued use of the Sites, which are governed by German law, the corresponding Terms of Use and this Privacy Policy, You are transferring Your Personal Data to the European Union and You consent to that transfer.

Please note that CST may transfer Your Personal Data outside of the European Union, as long as before transferring Your Personal Data, CST has ascertained that non-European Union entities, including CST Group Companies, offer an adequate level of protection in accordance with European legislation. CST Group Companies’ location is available at https://www.3ds.com/about-3ds/world-presence/.


Right access, to rectification and other rights

CST will take reasonable steps to ensure that the Personal Data collected is used for the purposes stated in this Privacy Policy and that such Personal Data is correct and up to date.

You have a right to access Your Personal Data. In addition, You have a right to request the rectification, completion, update or erasure of Your Personal Data. You have a right to restrict processing. You also have a right to obtain a copy of Your Personal Data stored by CST. You have a right to object, in relation to specific processing of Your Personal Data. Additionally, You may have a right to data portability.

If You have an account, You can exercise Your rights by logging on to Your account. Otherwise, You may exercise Your rights by sending an email to: simulia.cst.web@3ds.com.

Depending on the scope of the request, CST reserves the right to charge a reasonable fee to cover any out-of-pocket costs incurred in connection with such access, modification and deletion of Personal Data. CST may deny access to Personal Data in limited circumstances, defined by applicable laws and regulations.


Data recipients

Your Personal Data may be disclosed to and used by a CST Group Company for the purposes stated in Article 4 of this Privacy Policy.

Where CST has knowledge that a third party to which CST has provided Personal Data for the purposes listed in Article 4 above is using or disclosing Personal Data contrary to this Privacy Policy or to applicable laws, CST will take reasonable steps to prevent or stop such use or disclosure. CST will also disclose Your Personal Data to third parties if CST determines that such disclosure is necessary for technical reasons (such as hosting services by a third party) or to protect CST’s legal interests (such as in the event of a sale of assets to a third company, or a change of control or a total or partial liquidation of CST).

Additionally, CST may share Your personal Data with the reseller assigned to You or in the territory where You are located for the purpose of Dassault Systèmes business. CST may also share Your Personal Data with business partners when CST and the business partner sponsor an event together or participate in a marketing promotion together and in which you engage.

CST may also disclose Your Personal Data if required by law or if CST believes in good faith that such disclosure is reasonably necessary to comply with legal process (for example, a warrant, a subpoena, or other court order) or protect the rights, property, or personal safety of CST, CST’s customers, or the public. If allowed by applicable law, CST may also share Your Personal Data with third parties in order to offer You targeted marketing or advertising.


Data security

CST undertakes to ensure the protection and security of Personal Data that You choose to communicate, in order to ensure the confidentiality of Your Personal Data and prevent Your Personal Data from being distorted, damaged, destroyed or disclosed to unauthorized parties.

CST maintains reasonable physical, electronic, and procedural safeguards to protect Personal Data from loss, misuse and unauthorized access, disclosure, alteration and destruction. As part of those safeguards, CST employs sophisticated technology designed to protect Personal Data during its transmission and prevent transmission errors or unauthorized acts of third parties. However, while CST strives to protect Your Personal Data, in light of the inevitable risks of data transmission over the internet, CST cannot guarantee full protection against any error occurring during the course of Personal Data transmission which is beyond CST' reasonable control.

Since all Personal Data is confidential, access is limited to employees, contractors and agents of CST or CST Group Companies who have a need to know such data in carrying out their tasks. All the people who have access to Your Personal Data are bound by a duty of confidentiality and subject to disciplinary actions and/or other sanctions if they fail to meet these obligations.

However, it is important for You to exercise caution to prevent unauthorized access to Your Personal Data. You are responsible for the confidentiality of Your password and information appearing on Your account. Consequently, You must ensure that You log out of Your session in the event of shared use of a computer.



The Sites may use cookies or other technologies serving the same or similar purpose (together referred to as “cookies”), that may collect or store Personal Data. Cookies are text files stored and used to record Non-Personal and Personal Data concerning Your browsing and use of the Sites. Cookies can be either persistent (i.e. remain after You logoff from the Sites in order to be used on Your subsequent visits to the Sites) or transient (i.e., removed when You close the web browser).

To view the list of cookies CST uses and their purpose, follow the link by clicking the "Cookies" button below:


Or by typing the following URL in your Browser: https://www.cst.com/cookies

CST uses cookies in order zo:

  • Improve Your user experience through, for example:
    • enabling a service to recognize Your device so You don't have to give the same information several times during one task;
    • recognizing that You may already have given a username and password so You don't need to do so for every web page requested;
  • analyze traffic and data on the Sites to:
    • measure how many people are using the Sites, so the Sites can be made easier to use and navigate and to make sure there is enough capacity to ensure the Sites have adequate response times;
    • help CST understand how users interact with the Sites so CST can improve their functionality and performance.


CST may also use third party services (such as Adobe Analytics, Google Analytics, Piwik, DART, LinkedIn) to perform services on its behalf, in particular to:

  • analyze Your browsing habits and measure the Sites audience,
  • analyze Your interests and offer You targeted marketing or advertising,
  • allow You to share content from the services with other people on social networks or to let these other people know what You are looking at or what You think (e.g., the “Like” button on Facebook)


In such a case, cookies provided by such third party vendors may be used and stored. By transmitting the information generated by these cookies, the cookies’ settings ensure that an IP address is anonymized before geo-localization and before storage. Our providers will use this information for the evaluation of Your use of the Sites, compiling reports on the Sites activity for CST, to propose better services to You that are suited to Your needs, and display advertisements You that are suited to Your needs. Cookies will not associate Your IP address with any other data they hold.

When You browse the Sites, cookies are enabled by default and data may be read from or stored locally on Your device if Your browser settings allow. You will be notified of the use of cookies the first time You access the Sites with a different device; CST will not install any cookies before obtaining Your explicit consent. You may decide to accept or refuse some or all cookies. You can configure Your browser software to refuse all cookies (including cookies used for web analytics services); if You do so, however, some areas and features of the Sites may not function properly and/or You may not be able to access some parts or services of the Sites.

You can set your preferences inside your MyCST Account under Settings. Follow the link by clicking the "MyCST Settings" button below:

MyCST Settings

Or by typing the follwoing URL in your Browser:https://www.cst.com/account/my-interests


Links to websites not controlled by CST or its subsidaries

The Sites might offer links to third party websites that may be of interest to You

CST does not exercise any control over the content of third party websites or the practices of these third parties in connection with the protection of Personal Data that they might collect and are thus not in the control of CST. Consequently, CST shall have no liability for the content of third party websites or the practices of these third parties concerning the protection of Personal Data.

It is therefore Your responsibility to inform yourself of the privacy policies of these third party websites.


Dispute resolution

Although CST has put in place reasonable safeguards to protect Personal Data, CST recognizes that there is no method of transmitting or storing Personal Data that is completely secure.

However, CST is committed to ensure the privacy of Personal Data: if You have a reason to believe that the security of Your Personal Data has been compromised or misused, You should contact CST via the following address: simulia.cst.web@3ds.com.

CST will investigate and attempt to resolve complaints regarding use and disclosure of Personal Data in accordance with the principles contained in this Privacy Policy. Unauthorized access to Personal Data or the improper use of Personal Data may constitute offenses under local law. If Your usual place of residence is in European Union, Lichtenstein, Norway or Iceland, You have a right to file a complaint with Your competent data protection authority



For any additional question concerning this Privacy Policy, to opt out of receiving information from CST or any request regarding Your rights in Your Personal Data You may send an email to the following email address: simulia.cst.web@3ds.com.

Please note that You may also contact 3DS Data Protection Officer via the following address: 3DS.Compliance-Privacy@3ds.com


Date of entry into force of the privacy policy and changes to it

This Privacy Policy may be updated according to CST' requirements and circumstances, or where required by applicable laws and regulations so please check back periodically for updates.

If major changes occur to this Privacy Policy, CST may inform You via email or via posting a notice on the Site.


Last modification: May 25th 2018.

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