A keyed Hash Message Authentication Code (HMAC) is an extension to the MAC function.The encryption scheme is illustrated as follows. 6.2 DES STRUCTUREUS20140189367A1 - Digital-encryption hardware acceleratorThe algorithm used to generate and verify the MAC is based on the DES. The same 56-bit cipher key is used for both encryption and decryption. 6.1 Encryption and decryption with DES At the encryption site, DES takes a 64-bit plaintext and creates a 64-bit ciphertext at the decryption site, DES takes a 64-bit ciphertext and creates a 64-bit block of plaintext.The output of step 3 - Google Patents US20140189367A1 - Digital-encryption hardware acceleratorIt supports Windows, Mac, tablets, self-encrypting drives, and removable media. Finally, encrypt the output of step 2 using single DES with key K 3. Now decrypt the output of step 1 using single DES with key K 2. Encrypt the plaintext blocks using single DES with key K 1.
![]() Encrypting groups of characters of a plain text message using fixed encryption transformation H04L9/0618— Block ciphers, i.e. DES systems or RC4 Hash functions Pseudorandom sequence generators H04L9/06— Cryptographic mechanisms or cryptographic arrangements for secret or secure communication the encryption apparatus using shift registers or memories for block-wise or stream coding, e.g. H04L9/14— Cryptographic mechanisms or cryptographic arrangements for secret or secure communication using a plurality of keys or algorithms For accelerating processing of cryptographic operationsAccording to an aspect of the present invention, an electronic device is provided for encrypting and decrypting data blocks of a message having n data blocks in accordance with the data encryption standard (DES as defined in the ISO/IEC 7816-4 Secure Messaging Protocol). H04L2209/125— Parallelization or pipelining, e.g. H04L2209/12— Details relating to cryptographic hardware or logic circuitry H04L2209/00— Additional information or applications relating to cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00 H04L9/0643— Hash functions, e.g. Cipher block chaining , electronic codebook or Galois/counter mode Mobile legends emulator for macThe processing stage is typically a processor unit dedicated to perform encryption or decryption in accordance with the DES standard. The control stage is adapted to control the first processing stage to perform data encryption or decryption according to the data encryption standard on each block and to control the second processing stage to compute a message authentication code over the encrypted or decrypted message received from the first processing stage block-by-block.Accordingly, the aspect of the present invention provides a solution, which is based on pipelined and parallel architecture using two processing stages. The electronic device further comprises a control stage for controlling the first processing stage and the second processing stage, in a manner so as to perform an encryption or decryption step with the second processing stage on an encrypted or decrypted data block output from the first processing stage. Further, there is a second data input buffer coupled to an output of the first processing stage and to the second processing stage. In a second data processing channel, there is a second processing stage for performing encryption and decryption of data blocks in accordance with the DES standard. Further, there is a first input data buffer coupled to a data input and to the first processing stage. Des Encryption Plus 8 ParityA triple-DES operation consists of three successive rounds of single-DES operations. 56 bit plus 8 parity bits in accordance with the DES Standard) key while a 128 bit key is used for triple-DES operations. A single-DES operation encrypts or decrypts a 64 bit wide data block using a 64 bit (i.e. Each core can handle single- and triple-DES operations. Each crypto core is capable of performing symmetrical cryptographical operations on 8 byte size data blocks according to the DES Standard. The processing stages or crypto cores allow the execution of two DES operations in parallel. ![]() For the first operation an initial cipher vector C 0 is used. The plain input data block P 1 is first buffered and XORed with the results of the previous operation before it is encrypted. On the left-hand side a cipher block chaining mode for encryption is illustrated. 2 shows encryption and decryption according to the cipher block chaining mode (CBC). Get microsoft word on mac for free 2013This reduces complexity of the circuits. However, the second channel can be simplified in that only CBC mode is provided for encryption. According to this aspect of the present invention, the channels of the electronic device are adapted to perform ECB mode and CBC mode. For the first operation and the decryption the same initial vector C 0 must be used for the encryption. During decryption the data output of the crypto core (3)DES −1 must be XORed with the previous ciphered input block before the plain data can be read. 2 shows the corresponding decryption operation. In this second processing stage the encrypted data block is further encrypted in accordance with a single-DES or triple-DES operation. The encrypted data block is passed to a second processing stage (crypto core). A data block is encrypted in a first processing stage in accordance with a single-DES or triple-DES operation.
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