What is the name of such an encryption algorithm?

There is an encrypted number, assumed to be 494686764656546412314889594

Then the password is 4897.

Then the password 4897 is populated with the same length as encrypted

494686764656546412314886594=a

489748974897489748974897489=b

With A+b, but greater than 10 o'clock minus 10, get (with the first digit of A and b of the first digit in order to add this in turn)

A bunch of numbers like 873324638443925150288673973=c

Then the password 4897 is again populated to C so long (ie =b)

Then use C-b, get (same algorithm, just when less than 0 o'clock, c+10, can say c

873324638443925150288673973

489748974897489748974897489

Get

494686764656546412314889594 (same as a)

So I can use an arbitrary long number to encrypt a number, while the resulting number can be numerous encryption operations, and each encrypted password can be the same and can be different

When someone gets the encryption (after C), he can enter any number to get a string of numbers, but only after entering 4897 to get a in C

Finally ask what this algorithm is called, this is my own boredom calculated

This article is from the "13339286" blog, please be sure to keep this source http://13349286.blog.51cto.com/13339286/1967990

What is the name of such an encryption algorithm?