A data processing system to restrict content transmission in a networked environment, comprising: an interface to receive a content request from a client computing device; a natural language processor configured to: receive an input audio signal comprising the content request; parse the input audio signal to identify the content request and a trigger keyword; a content selector component, executed by the data processing system, to select a first digital component based on the content request and the trigger keyword, the first digital component comprising a first plurality of characters; and a manipulation detection component, executed by the data processing system, to: retrieve a dictionary comprising an indication of a portion of candidate characters included in a plurality of digital components; convert the first plurality of characters into a character vector based on the dictionary comprising the indication of the portion of the candidate characters included in the plurality of digital components; classify the first digital component into a first class of a plurality of classes based on a sequence of the first plurality of characters in the character vector; determine to not include the first digital component in a response to the content request from the client computing device based on the classification of the first digital component into the first class of the plurality of classes; and generate the response based on the content request from the client computing device, the response not including the first digital component based on the determination to not include the first digital component in the response. an interface to receive a content request from a client computing device; a natural language processor configured to: receive an input audio signal comprising the content request; parse the input audio signal to identify the content request and a trigger keyword; receive an input audio signal comprising the content request; parse the input audio signal to identify the content request and a trigger keyword; a content selector component, executed by the data processing system, to select a first digital component based on the content request and the trigger keyword, the first digital component comprising a first plurality of characters; and a manipulation detection component, executed by the data processing system, to: retrieve a dictionary comprising an indication of a portion of candidate characters included in a plurality of digital components; convert the first plurality of characters into a character vector based on the dictionary comprising the indication of the portion of the candidate characters included in the plurality of digital components; classify the first digital component into a first class of a plurality of classes based on a sequence of the first plurality of characters in the character vector; determine to not include the first digital component in a response to the content request from the client computing device based on the classification of the first digital component into the first class of the plurality of classes; and generate the response based on the content request from the client computing device, the response not including the first digital component based on the determination to not include the first digital component in the response. retrieve a dictionary comprising an indication of a portion of candidate characters included in a plurality of digital components; convert the first plurality of characters into a character vector based on the dictionary comprising the indication of the portion of the candidate characters included in the plurality of digital components; classify the first digital component into a first class of a plurality of classes based on a sequence of the first plurality of characters in the character vector; determine to not include the first digital component in a response to the content request from the client computing device based on the classification of the first digital component into the first class of the plurality of classes; and generate the response based on the content request from the client computing device, the response not including the first digital component based on the determination to not include the first digital component in the response.