Abstract: A method for generating a key stream according to an embodiment includes generating r round keys that are each N-dimensional integer vectors including elements of an integer set defined based on a prime number t, based on a random bit string, an encryption counter, and a secret key that is an N-dimensional integer vector consisting of elements of the integer set , generating a first round output vector x1 by performing a modular addition operation on an initial vector and a first round key RK1 of the r round keys with the prime number t as a modulus, and generating a key stream that is an N-dimensional integer vector consisting of elements of the integer set from the first round output vector x1 by using a second to r-th round keys of the r round keys, and one or more first round functions and a second round function.

Abstract: The present invention provides a specific acrylate compound component for a pressure-sensitive adhesive composition where it has excellent wettability, light resistance, and heat resistance. Moreover, it provides the pressure-sensitive adhesive composition which can cover step differences and defects and can minimize air bubbles or liftings between laminated layers while satisfying fundamentally required physical properties such as durability and pressure-sensitive adhesive. Especially, it provides the pressure-sensitive adhesive composition capable of minimizing air bubbles or liftings between laminated layers while satisfying fundamentally required physical properties such as durability and pressure-sensitive adhesive even when left at high temperature for a long time. It also provides an optical pressure-sensitive adhesive product which can cover defects located between laminated layers for a display module or a transparent electrode product.

Abstract: A power supply device having a surge protection function is provided.