Abstract: This application provides a training method for a detection model, a system, a device, and a storage medium, belongs to the field of network security technologies, and further relates to application of an AI technology in the field of network security technologies. Some embodiments of this application provide a method for training a detection model by using federated learning. In the method, a gateway device serves as a participant of federated learning, and a server aggregates model parameters and delivers shared malicious samples for the gateway device. When the gateway device performs model training, the gateway device exchanges information such as the model parameters and the shared samples with the server, to obtain a detection model through training.

Abstract: A network attack detection method and apparatus is provided. The network protection device obtains first key data from received first network traffic, and matches the first key data with an attack signature in a signature database to obtain a first matching result; if the network protection device determines, based on the first matching result, that the first network traffic is aggressive, the network protection device obtains a target attack detection model based on the first network traffic, where the target attack detection model is used to identify one or more attack signatures that are different from the attack signature in the signature database; and when the network protection device receives second network traffic, the network protection device determines, based on the target attack detection model, whether the second network traffic is aggressive.

Abstract: Disclosed is a lycopene food colorant having a fresh-keeping function. The food colorant is prepared from the following raw materials in parts by weight: 1-3 parts of a lycopene crystal, 5-20 parts of an emulsifier, 0.5-5 parts of an antioxidant, 60-70 parts of glycerol, and 10-20 parts of water. The food colorant is prepared by mixing the raw materials and then emulsifying and grinding same. The granularity of the obtained lycopene colorant is moderate; the tone is suitable for coloring a minced fillet product; the lycopene colorant has high tinting strength, achieves a bright color, and has the effect of triggering myoglobin, so that the minced fillet product has a bright color and appears fresher; the lycopene colorant further has a fresh-keeping function and can kill some food microorganisms, so as to keep food fresh and prolong the shelf life.

Abstract: A worm detection method and a network device, the method including obtaining first session information of a first host in a first time window, the first session information being session information of the first host that is actively connecting to one or more other hosts, determining, based on the first session information, a data feature corresponding to the first host, the data feature corresponding to the first host describing behavior of the first host accessing the one or more other hosts, and obtaining a prediction result by analyzing, based on a worm detection model, the data feature corresponding to the first host, where the worm detection model is a model generated by training data features corresponding to a plurality of hosts in a first network in which the first host is located, and wherein the prediction result indicates whether the first host is worm-infected.

Abstract: Disclosed is a lycopene food colorant having a fresh-keeping function. The food colorant is prepared from the following raw materials in parts by weight: 1-3 parts of a lycopene crystal, 5-20 parts of an emulsifier, 0.5-5 parts of an antioxidant, 60-70 parts of glycerol, and 10-20 parts of water. The food colorant is prepared by mixing the raw materials and then emulsifying and grinding same. The granularity of the obtained lycopene colorant is moderate; the tone is suitable for coloring a minced fillet product; the lycopene colorant has high tinting strength, achieves a bright color, and has the effect of triggering myoglobin, so that the minced fillet product has a bright color and appears fresher; the lycopene colorant further has a fresh-keeping function and can kill some food microorganisms, so as to keep food fresh and prolong the shelf life.