Opera Software
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  2. Menus
  3. Panels
  5. Widgets
  6. Notes
  7. Content Blocking
  8. BitTorrent
  9. Display Modes
  10. Source Viewer
  11. Preferences
  12. Advanced Preferences
  13. Skins
  14. Keyboard Shortcuts
  15. Using the Mouse
  16. E-mail and News
  17. Newsfeeds
  18. Chat
  19. Dialogs
  20. Backing Up Opera


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In the Security preferences you can manage your security certificates and set up which security protocols to use. Opera can also warn you about potentially unsafe situations.

Master Password

To prevent other people from using your certificates, you can set a master password with strong 168-bit triple DES encryption.

You will then be asked to enter your master password when you want to use your certificates.

You can also use the master password to protect your e-mail, news, and Wand passwords.

Security Protocols

Security protocols are used to communicate securely with sites where sensitive data, such as credit card information, is involved.

If you want to use only Web services with strong security, you can disable SSL 2, SSL 3, and ciphers below 128 bits to prevent connections to less secure Web services. Note, however, that this is likely to cause many such services to malfunction.

Note: When you are on sites using security protocols, a yellow security bar will be displayed inside the address field. In addition to a padlock icon that signals the level of security present, you will also see the name of the organization that the certificate is registered to. Click the bar for additional information.


Certificate authorities are used to identify secure Web sites. For example, the secure version of the University of Oslo Web site is authorized by the Thawte organization. Most of the certificate authorities you will need are installed with Opera.

Personal certificates are used to identify you as the genuine user of a Web service. These certificates are normally installed the first time you sign up for the service.

Certificate handling is in most cases effortless and automatic. If you are unsure about using a particular certificate you can:

To restore a deleted certificate, visit the original provider's Web site or re-install Opera. You can also import and export certificates between Opera and other software.

Learn more about accepting certificates


Opera can warn you before sending insecure forms or uploading pages to a markup validator. Keep these settings enabled if you are concerned about unintentionally sending sensitive data over the Internet.

Submitting forms to services such as search engines and open discussion forums is harmless.

Learn more about security