Abstract: The present invention relates to a communication method that includes an operation of receiving a succession of pages originating from a first site of a computer network. That method further includes an operation of memory storage of information representative of the succession of pages, outside the first site and an operation of associating a certificate of integrity with the memory-stored information representative of the succession of pages. The certificate of integrity is stored in memory in association with the information representative of the succession of pages. The certificate of integrity makes it possible to detect any alteration to the memory-stored information representative of the succession of pages, subsequent to its being stored in memory.

Abstract: The device includes: an information intake system that obtains a value representing a non-sensory biological activity of a user's body, such as the pulse or the activity of a limb, a filter for filtration of the value obtained by the said information intake device, which provides a relative position of the said value in a cycle representing a temporal variation of the said biological activity, and an output system to allow the user to know information representing the relative position, for example an alarm, a screen, or a watch hand on a dial.