Abstract: A network apparatus receives a first message relating to a transport layer security (TLS) handshake process for an initialization phase of a Quic user datagram protocol (UDP) Internet Connection (QUIC) connection from a client computing device toward a target computing device, wherein the first message of the TLS handshake process comprises at least a connection identifier. The network apparatus generates a second message relating to the TLS handshake process in response to the first message, wherein a cipher suite value of the second message is set to an invalid cipher suite value for the client computing device and wherein the invalid cipher suite value is unsupported by the client computing device, and sends the second message to the client computing device to cause the client computer device to close the QUIC connection.

Abstract: A network gateway apparatus monitors Quic user datagram protocol (UDP) Internet Connection (QUIC) packets between a first device and a second device, extracts a version of the QUIC protocol and a connection identification from an unprotected portion of the protected header in response to detecting a QUIC packet having a protected header in use, determines a salt used in encryption of the protected header based on the version of the QUIC protocol, calculates a client initial secret based on the salt and the connection identification, determines an unprotected payload of the QUIC packet based on the client initial secret, a protected payload of the QUIC packet and the unprotected portion of the protected header, and extracts a server name indication (SNI) from the unprotected payload.

Abstract: A network gateway apparatus monitors Quic user datagram protocol (UDP) Internet Connection (QUIC) packets between a first device and a second device, extracts a version of the QUIC protocol and a connection identification from an unprotected portion of the protected header in response to detecting a QUIC packet having a protected header in use, determines a salt used in encryption of the protected header based on the version of the QUIC protocol, calculates a client initial secret based on the salt and the connection identification, determines an unprotected payload of the QUIC packet based on the client initial secret, a protected payload of the QUIC packet and the unprotected portion of the protected header, and extracts a server name indication (SNI) from the unprotected payload.

Abstract: A network apparatus receives a first message relating to a transport layer security (TLS) handshake process for an initialization phase of a Quic user datagram protocol (UDP) Internet Connection (QUIC) connection from a client computing device toward a target computing device, wherein the first message of the TLS handshake process comprises at least a connection identifier. The network apparatus generates a second message relating to the TLS handshake process in response to the first message, wherein a cipher suite value of the second message is set to an invalid cipher suite value for the client computing device and wherein the invalid cipher suite value is unsupported by the client computing device, and sends the second message to the client computing device to cause the client computer device to close the QUIC connection.

Abstract: A multichannel X-ray spectrometer comprises, in each spectrometric channel, individual holders for a focusing crystal analyzer and for an outlet slit, which are placed on a base and made as cylindrical supports equipped with slit locks. Cylindrical sockets are provided on the end face of the base and arranged adequately with respective cylindrical supports. Each socket has its own cylindrical support placed therein so that the slit locks envelop side surfaces of the base. The axes of the cylindrical supports coincide with the central generating line of the crystal analyzer and the outlet slit, respectively, and are spaced apart to a distance equal to 2R (1-2.delta.) sin .theta., where R is the radius of the focusing circle of the focusing crystal analyzer, .delta. is the mosaic structure factor, and 0 is the Bragg reflection angle. The end face of the base between the cylindrical sockets has an angle equal to 180.degree.-2.theta..