Implementation of encryption technology

For security issues, has always been the focus of attention, see the Internet on the decryption of the site a lot of, however, we also have to try to think about the strategy.

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Encryption hack website

MD5 encryption Technology (Message digest algorithm version fifth).

The principle is: Generate 128-bit hash values (32 characters) for the input information

Scenarios used: Digital signature, password encryption, password encryption.

MD5 is not very safe, the usual method of adding security is:

(1) Add salt: Insert a random string at a fixed position in clear text and then MD5 again.

(2) First encryption, after the chaos sequence: first MD5 the plaintext, and then encrypt the resulting MD5 string of characters to disorderly order.

In short, the hacker is to breach the server database is not able to correctly draw clear text.

Base 64 Encryption technology:

(1) Very common encryption technology.

(2) binary data can be converted to "string"

(3) After encoding the result is "A-Z", "A-Z", "+", "-", and auxiliary symbol "=" Of course auxiliary symbols are not necessary to appear.

Shai Encryption Algorithm (security hashing algorithm designed by US security Agency):

Generates a unique 140-bit hash value for the information entered, (40 bytes) with frequent security.

RSA Encryption algorithm:

Algorithm principle: It is easy to multiply two large primes, but it is extremely difficult to factorization the product, so the product can be exposed as the encryption key.

Look at the internet is how can say the reference as long as the key is long enough, in the current technological development situation can not be cracked. is an algorithm capable of simultaneous user encryption and digital signature, and is one of the best public-key algorithms so far.

Implementation of encryption technology