Base 36 Cipher

Base 36 encryption uses the principle of arithmetic base change (conversion from base 36 to base 10). Thus, the words are considered to be numbers written in base 36 (with 36 alphanumeric symbols made of the 26 letters of the alphabet ABCDEFGHIJKLMNOPQRSTUVWXYZ and the 10 digits 0123456789) then converted into a decimal number (in base 10).

Example: To code the 3 characters B36 in base 36 using the symbols 0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ, first convert each character to base 10: B=11, 3=3, 6=6 and apply the base change formula: $ 11 \times 36^2 + 3 \times 36^1 + 6 \times 36^0 = 14370 $

It is possible to use 2 sets of symbols for base 36 : either digits then letters

Or letters then digits

The decryption of the base 36 consists of the conversion of coded numbers from the base 10 to the base 36.

Example: Decode the message 527198. $ 527198 = 11 \times 36^3 + 10 \times 36^2 + 28 \times 36^1 + 14 \times 36^0 $ so [11,10,28,14] in base 36 and 11=B, 10=A, 28=S, 14=E. The plain message is BASE.

The coded message consists of decimal numbers whose length is proportional to the length of the word.

The same word is coded with the same number, so the numbers corresponding to the common words appear coded several times.

Round values in decimal:

Round values in base36 :