Patterns — hide

• Encryption with user-managed keys

  Use encryption in such a way that the service provider cannot decrypt the user's information because the user manages the keys.

• Use of dummies

  This pattern hides the actions taken by a user by adding fake actions that are indistinguishable from real.

• Pseudonymous Messaging

  A messaging service is enhanced by using a trusted third party to exchange the identifiers of the communication partners by pseudonyms.

• Onion Routing

  This pattern provides unlinkability between senders and receivers by encapsulating the data in different layers of encryption, limiting the knowledge of each node along the delivery path.

• Psuedonymous Identity

  Hide the identity by using a pseudonym and ensure a pseudonymous identity that can not be linked with a real identity during online interactions.

• Aggregation Gateway

  Encrypt, aggregate and decrypt at different places.

• Anonymous Reputation-based Blacklisting

  Get rid of troublemakers without even knowing who they are.

• Added-noise measurement obfuscation

  Add some noise to service operation measurements, but make it cancel itself in the long-term

• Attribute Based Credentials

  Attribute Based Credentials (ABC) are a form of authentication mechanism that allows to flexibly and selectively authenticate different attributes about an entity without revealing additional information about the entity (zero-knowledge property).

• Trustworthy Privacy Plug-in

  Aggregate usage records at the user side in a trustworthy manner.

• Anonymity Set

  This pattern aggregates multiple entities into a set, such that they cannot be distinguished anymore.