A tactile wearable device in a communication system, the tactile wearable device comprising: at least two switches arranged to receive first tactile information from user in a sequence, at least two tactile actuators arranged to provide second tactile information to a user in a sequence, and wireless communication means arranged to transmit information to and from a wireless device.

A starting method for inputting Morse code and a portable electronic device thereof are provided. The starting method for inputting Morse code is performed in the portable electronic device that includes a first physical button, a second physical button, a sensing circuit and a processing circuit. The starting method for inputting Morse code includes steps of: when the portable electronic device is switched to a sleep mode or a shutdown mode, enabling the sensing circuit to sense whether the first physical button and the second physical button are simultaneously pressed by a user; and when the first physical button and the second physical button are simultaneously pressed by the user, enabling the processing circuit to generate a longer mark of Morse code or a shorter mark of Morse code according to the duration for which the user presses the first physical button or the second physical button.

A starting method for inputting Morse code and a portable electronic device thereof are provided. The starting method for inputting Morse code is performed in the portable electronic device that includes a first physical button, a second physical button, a sensing circuit and a processing circuit. The starting method for inputting Morse code includes steps of: when the portable electronic device is switched to a sleep mode or a shutdown mode, enabling the sensing circuit to sense whether the first physical button and the second physical button are simultaneously pressed by a user; and when the first physical button and the second physical button are simultaneously pressed by the user, enabling the processing circuit to generate a longer mark of Morse code or a shorter mark of Morse code according to the duration for which the user presses the first physical button or the second physical button.

A backup account recovery authentication of last resort using social authentication is described. The account holder requests trustees who have been previously identified to obtain an account recovery code. The account recovery system sends a communication to the trustee for information to verify the trustee as one of the previously identified trustees. The account recovery system then may transmit a link and code with instructions for the trustee to return the link. The account recovery system then transmits a situational query to the trustee to provide additional security. Finally, if all the communications have been completed for the required level of security, the account recovery code is transmitted to the trustee. The trustee sends the account recovery code to the account holder for access to an account.