Method and apparatus of high speed encryption and decryption

A decryption method for decrypting an array of encrypted data blocks, the method comprising:

• generating an array of tweaking values corresponding to the array of encrypted data blocks based on a tweaking encryption key by a tweaking value manager, the generating the array of tweaking values including:
• encrypting an initial tweaking value with the tweaking encryption key to generate an encrypted initial tweaking value by an AES-ECB engine;
• and
• calculating the array of tweaking values based on the encrypted initial tweaking value by a tweaking value generator;
• expanding a data decryption key into a first set of round keys and a second set of round keys by a key expansion hardware module;
• storing the first set of round keys and the second set of round keys in a memory;
• decrypting a first portion of the array of encrypted data blocks into a first portion of decrypted data blocks based on corresponding tweaking values and the first set of round keys by a first decryption unit, the decrypting the first portion of the array of encrypted data blocks including:
• calculating a first tweaked encrypted data block based on a first encrypted data block in the first portion of the array of encrypted data block and the corresponding tweaking value by a first tweaking unit;
• and
• decrypting the first tweaked encrypted data block into a first tweaked decrypted data block based on the first set of round keys by a first AES-ECB engine;
• and
• calculating a second decrypted data block based on a second tweaked decrypted data block and the corresponding tweaking value by a second tweaking unit of a second decryption unit.

A decryption method for decrypting an array of encrypted data blocks, the method comprising:

• generating an array of tweaking values corresponding to the array of encrypted data blocks based on a tweaking encryption key by a tweaking value manager, the generating the array of tweaking values including:
• encrypting an initial tweaking value with the tweaking encryption key to generate an encrypted initial tweaking value by an AES-ECB engine;
• and
• calculating the array of tweaking values based on the encrypted initial tweaking value by a tweaking value generator;
• expanding a data decryption key into a first set of round keys and a second set of round keys by a key expansion hardware module;
• storing the first set of round keys and the second set of round keys in a memory;
• decrypting a first portion of the array of encrypted data blocks into a first portion of decrypted data blocks based on corresponding tweaking values and the first set of round keys by a first decryption unit, the decrypting the first portion of the array of encrypted data blocks including:
• calculating a first tweaked encrypted data block based on a first encrypted data block in the first portion of the array of encrypted data block and the corresponding tweaking value by a first tweaking unit;
• and
• decrypting the first tweaked encrypted data block into a first tweaked decrypted data block based on the first set of round keys by a first AES-ECB engine;
• and
• decrypting a second tweaked encrypted data block into a second tweaked decrypted data block based on the second set of round keys by a second AES-ECB engine of a second decryption unit.