Protecting content from third party using client-side security protection

A messaging system comprising:

• a computing device using an untrusted message service for transmitting a message;
• a rules component associated with the untrusted message service, wherein the rules component is configured to analyze the message using one or more rules, wherein analyzing the message comprises:
• evaluating input during composition of the message;
• applying the one or more rules to the message;
• monitoring for changes to the input of the message;
• and
• when changes to the input are detected, reevaluating the input;
• and
• a security component associated with the computing device, wherein the security component is configured to apply the security to the message, wherein the security prevents a body portion of the message from being exposed at the untrusted message service when the message is transmitted, and wherein the security includes attaching one or more attributes of the security to the message, and wherein the security is applied in response to a determination that the untrusted message service is being used to send the message.

A method of processing messages, the method comprising:

• receiving, by a computing device, a message from a client to a recipient;
• analyzing the message using rules from a rules component, wherein the rules are used to generate security for the message, and wherein analyzing the message comprises:
• evaluating input during composition of the message;
• applying the one or more rules to the message;
• monitoring for changes to the input of the message;
• and
• when changes to the input are detected, reevaluating the input;
• applying, by the computing device, the security to the message, wherein the security prevents a body portion of the message from being exposed at the untrusted message service, and wherein the security includes attaching one or more attributes of the security to the message, and wherein the security is applied in response to a determination that the untrusted message service is being used to send the one or more messages;
• and
• sending the message to the recipient using the untrusted message service.