A piece of text is saved for security verification on a computing device. One or more pieces of related text corresponding to the piece of saved text are generated, where each text element of the one or more pieces of related text is generated based on its proximity to the corresponding text element of the piece of saved text on one or more keyboards on the computing device. A piece of input text is received for information verification. A piece of input text is compared with the piece of saved text and the one or more pieces of related text. A determination is made that the piece of input text matches one of the one or more pieces of related text and input guidance for re-entering a piece of text for security authentication is provided.