change DES branch

Author: Allenem

README.md

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 This is just a repository about 《Introduction of Information Security》 experiments
 
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 ## DES
 
 [DES](./DES)
 
 >The Data Encryption Standard (DES /ˌdiːˌiːˈɛs, dɛz/) is a symmetric-key algorithm for the encryption of electronic data. Although its short key length of 56 bits, criticized from the beginning, makes it too insecure for most current applications, it was highly influential in the advancement of modern cryptography.
 
 From Wikipedia, the free encyclopedia (https://en.wikipedia.org/wiki/Data_Encryption_Standard)
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-## RSA
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-[RSA](./RSA)
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->RSA (Rivest–Shamir–Adleman) is one of the first public-key cryptosystems and is widely used for secure data transmission. In such a cryptosystem, the encryption key is public and it is different from the decryption key which is kept secret (private). In RSA, this asymmetry is based on the practical difficulty of the factorization of the product of two large prime numbers, the "factoring problem". The acronym RSA is made of the initial letters of the surnames of Ron Rivest, Adi Shamir, and Leonard Adleman, who first publicly described the algorithm in 1977. Clifford Cocks, an English mathematician working for the British intelligence agency Government Communications Headquarters (GCHQ), had developed an equivalent system in 1973, but this was not declassified until 1997.[1]
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-From Wikipedia, the free encyclopedia (https://en.wikipedia.org/wiki/RSA_(cryptosystem))