1. A method of performing data loss prevention on content from a content source, the method comprising: generating, by processing circuitry, multiple variants from the content, the multiple variants including a set of variants for each parsed word of the content, each variant of the set (i) including multiple characters and (ii) differing from other variants of the set by at least one character; performing, by the processing circuitry, evaluation operations to determine whether any of the variants includes sensitive data; and in response to the evaluation operations, performing, by the processing circuitry, a control operation which (i) releases all of the parsed words of the content to a destination when none of the variants is determined to include sensitive data, and (ii) blocks at least one parsed word of the content from reaching the destination when at least one variant is determined to include sensitive data; wherein generating the multiple variants from the content includes: applying a set of predefined transformations from a transformation database to the content from the content source to form the multiple variants.