Disclosed are methods and systems of implementing a right over a content or contents. Various implementations may include means and operations for receiving, for example in an execution environment and from a secure element, a first key for implementing a right over an encrypted content; decrypting said content in said execution environment with the help of the first key; and implementing the right over the content in said execution environment. Various implementations may also include means and operations for receiving a second key in, for example, said execution environment, from the secure element; and encrypting said content in sad execution environment with the help of the second key.