Same Keystream

First Ciphertext

The first ciphertext is plaintext A XOR the toy keystream.

highlighted = computed this step

First plaintext meets the keystream

Plaintext A is 0x7061793d3130.

plaintext A=0x7061793d3130\text{plaintext A}=0x7061793d3130
First ciphertextCiphertext is recomputed as plaintext XOR the reused toy keystream.Plaintext A48 bits / 6 bytes0x7061793d3130byte 0byte 1byte 2byte 301110000011000010111100100111101byte 4byte 50011000100110000byte-00x70byte-10x61byte-20x79byte-30x3dbyte-40x31byte-50x30Toy keystream48 bits / 6 bytes0x0f1e2d3c4b5abyte 0byte 1byte 2byte 300001111000111100010110100111100byte 4byte 50100101101011010byte-00x0fbyte-10x1ebyte-20x2dbyte-30x3cbyte-40x4bbyte-50x5aCiphertext A48 bits / 6 bytes0x7f7f54017a6abyte 0byte 1byte 2byte 301111111011111110101010000000001byte 4byte 50111101001101010byte-00x7fbyte-10x7fbyte-20x54byte-30x01byte-40x7abyte-50x6a

Ciphertext A is recomputed

Plaintext A XOR the toy keystream gives ciphertext A 0x7f7f54017a6a.

ciphertext A=0x7f7f54017a6a\text{ciphertext A}=0x7f7f54017a6a
First ciphertextCiphertext is recomputed as plaintext XOR the reused toy keystream.Plaintext A48 bits / 6 bytes0x7061793d3130byte 0byte 1byte 2byte 301110000011000010111100100111101byte 4byte 50011000100110000byte-00x70byte-10x61byte-20x79byte-30x3dbyte-40x31byte-50x30Toy keystream48 bits / 6 bytes0x0f1e2d3c4b5abyte 0byte 1byte 2byte 300001111000111100010110100111100byte 4byte 50100101101011010byte-00x0fbyte-10x1ebyte-20x2dbyte-30x3cbyte-40x4bbyte-50x5aCiphertext A48 bits / 6 bytes0x7f7f54017a6abyte 0byte 1byte 2byte 301111111011111110101010000000001byte 4byte 50111101001101010byte-00x7fbyte-10x7fbyte-20x54byte-30x01byte-40x7abyte-50x6a

The message is tiny

At the toy text level, plaintext A says pay equals 10.

pay A=10\text{pay A}=10
First ciphertextCiphertext is recomputed as plaintext XOR the reused toy keystream.Plaintext A48 bits / 6 bytes0x7061793d3130byte 0byte 1byte 2byte 301110000011000010111100100111101byte 4byte 50011000100110000byte-00x70byte-10x61byte-20x79byte-30x3dbyte-40x31byte-50x30Toy keystream48 bits / 6 bytes0x0f1e2d3c4b5abyte 0byte 1byte 2byte 300001111000111100010110100111100byte 4byte 50100101101011010byte-00x0fbyte-10x1ebyte-20x2dbyte-30x3cbyte-40x4bbyte-50x5aCiphertext A48 bits / 6 bytes0x7f7f54017a6abyte 0byte 1byte 2byte 301111111011111110101010000000001byte 4byte 50111101001101010byte-00x7fbyte-10x7fbyte-20x54byte-30x01byte-40x7abyte-50x6a

Summary

Ciphertext A is not authored by prose; it is recomputed from plaintext A and the keystream.

ciphertext A=0x7f7f54017a6a\text{ciphertext A}=0x7f7f54017a6a
First ciphertextCiphertext is recomputed as plaintext XOR the reused toy keystream.Plaintext A48 bits / 6 bytes0x7061793d3130byte 0byte 1byte 2byte 301110000011000010111100100111101byte 4byte 50011000100110000byte-00x70byte-10x61byte-20x79byte-30x3dbyte-40x31byte-50x30Toy keystream48 bits / 6 bytes0x0f1e2d3c4b5abyte 0byte 1byte 2byte 300001111000111100010110100111100byte 4byte 50100101101011010byte-00x0fbyte-10x1ebyte-20x2dbyte-30x3cbyte-40x4bbyte-50x5aCiphertext A48 bits / 6 bytes0x7f7f54017a6abyte 0byte 1byte 2byte 301111111011111110101010000000001byte 4byte 50111101001101010byte-00x7fbyte-10x7fbyte-20x54byte-30x01byte-40x7abyte-50x6a