Java Plus decryption

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Symmetric encryption: DES, AES

DES (Data encryption algorithm): The plaintext is grouped by 64 bits, the secret key is 64 bits long, the key is actually 56 bit to participate in the DES operation (8th, 16, 24, 32, 40, 48, 56, 64 bits are check bits, So that each key has an odd number of 1) After grouping the plaintext group and the 56-bit key to the bitwise substitution or Exchange method to form the encryption method of the ciphertext group.

AES (Advanced encryption algorithm): The chunk length is fixed at 128 bits, and the key length can be 128,192 or 256 bits.

Asymmetric encryption: Rsa,ecc,d-h

ECC (elliptic encryption algorithm): more efficient than RSA.

D-h (Diffie-hellman Key exchange protocol/algorithm (Diffie-hellman key exchange/agreement algorithm): Oakley algorithm optimization.

Hash (Digest algorithm): MD series, SHA series

Md5:16 byte (128-bit) checksum, typically represented by a 32-digit hexadecimal number. Verify data integrity.

SHA (Secure hashing algorithm): Because the data digest length of the SHA Series algorithm is long, its operation speed is relatively slow compared with MD5.

Java Plus decryption