摘要:
A method and apparatus for encoding data, and a method and apparatus for decoding data. The method of encoding data including generating first encoded data by encoding input data, dividing the first encoded data into a plurality of segments, and generating second encoded data by combining the plurality of segments and dummy data.
摘要:
Provided are a method and an apparatus for communication based on certification using a static identifier and an updatable dynamic identifier allowing a verified client to access a server.
摘要:
The method of decrypting a ciphertext includes: pre-storing a plurality of polynomial functions into which a secret key decrypting a ciphertext to a plaintext according to a public-key cryptography algorithm is broken down; receiving the ciphertext generated based on the secret key which is broken down into the plurality of polynomial functions from a ciphertext generating device; and decrypting the received ciphertext into the plaintext based on the pre-stored polynomial functions.
摘要:
An encryption method and apparatus for encrypting a plurality of rounds are provided. The encryption method including: extracting a conversion function, which is convertible in a table form from a predetermined block encryption method; converting the extracted conversion function into a corresponding converted table; applying the converted table to an input bit; applying an extension function, which extends an output bit, to an output of the converted table; and applying a restore function, which restores the extended output bit.