A1Z26 Cipher - Letter Number A=1 B=2 C=3 - Online Decoder, Translator https://www.dcode.fr/letter-number-cipher

A1Z26 Cipher - Letter Number A=1 B=2 C=3 - Online Decoder, Translator https://www.dcode.fr/letter-number-cipher

How to encrypt using Letter-to-Number cipher?

A1Z26 encryption requires to count the positions/ranks of letters in the alphabet. If it is the Latin alphabet of 26 characters here is the correspondence table letter number/value:

A	B	C	D	E	F	G	H	I	J	K	L	M	N	O	P	Q	R	S	T	U	V	W	X	Y	Z
1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26

Replace each letter with its position in the alphabet (A = 1, B = 2, ... Z = 26)

Example: DCODE is encrypted 4-3-15-4-5 by alphanumeric substitution

How to decrypt Number-to-Letter cipher?

Decryption requires taking each number and replace it with the letter of same position in the alphabet: 1 = A, 2 = B, ... 26 = Z

A	B	C	D	E	F	G	H	I	J	K	L	M	N	O	P	Q	R	S	T	U	V	W	X	Y	Z
1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26

Example: 1.12.16.8.1.2.5.20 gives ALPHABET

How to recognize Letter-to-Number ciphertext?

The crypted message is made of numbers between 1 and 26, sometimes the number 0 is used to code a space.

The digit 5 for E is supposed to appear regularly for an english text.

This encryption is sometimes called alphanumeric code.

What are the variants of the Letter-to-Number cipher?

Shift of numbers: the alphabet can start with A = 0 or A = 1, but also A = 65 or A = 97 (ASCII code).

Use of a supplementary character for space (usually 0 or 27)

Use of leading zeros to be able to concatenate numbers AB = 0102, else AB = 12 and 12 = L.

Use of a custom alphabet, or reversed alphabet (A=26, Z=1)

Use of modulo 26 in order to get 1=A,2=B,...26=Z then 27=A, 28=B etc.