Abstract: The disclosed implementations generally provide a user access to a secure network resource (e.g., a website, chat application). In some implementations, access to a secure network resource is provided by a communication terminal in communication with a secure access service. The communication terminal detects a presence of a unique identifier (e.g., a Bluetooth MAC address stored in a mobile device), and passes the unique identifier and cryptographic information (e.g., a key code or digital certificate) to the secure access service. The secure access service validates the integrity of the unique identifier and authenticates the user of the device by reading the cryptographic information (e.g., reading the certificate).

Abstract: A database of family, friends and professional network relationships are established through the exchange of unique identifiers between paired mobile devices using wireless technology. The paired mobile devices exchange information related to the users' identities. The mobile device users can independently upload the exchanged information through one or more access points to an online service. The online service uses the uploaded information to create online resources for the users.

Abstract: The present invention relates to pipes for the transmission and/or distribution of combustible gases, and liquefied gases, comprising a polyethylene layer and a polyamide inside and/or outside layer. These pipes may advantageously be connected together by adhesively bonded sleeves and thus form medium-pressure and low-pressure gas distribution and transmission networks or else they may be installed inside already existing metal pipes. These pipes may be manufactured by coextrusion.

Abstract: The present invention relates to pipes for the transmission and/or distribution of combustible gases, and liquefied gases, comprising a polyethylene layer and a polyamide inside and/or outside layer. These pipes may advantageously be connected together by adhesively bonded sleeves and thus form medium-pressure and low-pressure gas distribution and transmission networks or else they may be installed inside already existing metal pipes.

Abstract: A gas-impermeable elastic membrane including a co-polymeric gas-impermeable film including OH groups, positioned between two layers of a co-polymer containing blocks of polyamides and of polyesters, with a rubber coating on at least one of the two layers, as well as a method of manufacturing the membrane.