US 2022/0103347 A1 · ONE-TIME PAD ENCRYPTION FOR INDUSTRIAL WIRELESS INSTRUMENTS

Abstract

Methods and systems for implementing one-time pad (OTP) encryption in industrial wireless instruments advantageously make use of data storage devices now available that can store a large number of encryption keys or pads in a small enough package to fit within an industrial wireless instrument. In some embodiments, the wireless instruments use solid-state memory devices that can easily hold a sufficient number of pads to last the expected lifetime of the wireless instruments. The solid-state memory devices are installed only during manufacturing of the wireless instruments where tamper-resistant manufacturing and assembly techniques may be used to ensure security for the pads. Likewise, the solid-state memory devices of the wireless instruments are also replaced or replenished only at an authorized manufacturer should additional pads be needed.

Claims20

Dependent claims

An industrial wireless instrument equipped with one-time pad (OTP) encryption, comprising:

a pad storage unit installed within the industrial wireless instrument and having a plurality of one-time pads stored therein;
a one-time pad controller coupled to communicate with the pad storage unit and operable to retrieve a one-time pad from the pad storage unit for each plaintext data to be encrypted;
and
an arithmetic unit coupled to receive the plaintext data and the one-time pad from the one-time pad controller and operable to encrypt the plaintext data using the one-time pad;
wherein the one-time pad controller is further operable to provide the one-time pad to the arithmetic unit only once for encryption.

2 more elements

Dependencies are inferred from the claim text.

One-time pad encryption for industrial wireless instruments

Life of this patent

One-time pad encryption for industrial wireless instruments

Life of this patent

Abstract

Claims20