Author: Marin Radu
Decode 2 telephone number ciphers.
- Telephone number encoding
Extract the text from the image.
tesseract code.jpg out.txtUse an online tool for DTMF to decode the first code.
1209-852 1209-852 1209-852 1209-852 1477-770 1336-697 1336-697 1336-697 1336-697 1336-697 1336-697
1209-770 1209-770 1209-770 1336-852 1336-697 1209-852 1209-852 1477-697 1477-697 1477-697 1477-852
1477-852 1477-852 1477-770 1477-770 1477-770 1336-852 1336-852 1209-852 1209-852 1209-852 1209-852
1209-770 1209-770 1477-770 1477-770 1477-770 1477-770 1477-770 1477-697 1477-697
222 7777 222 8 333 0 444 0 8 2 7 7 33 3 0 999 666 88 777 0 7 44 666 66 33
Use another tool like this one - Multitap ABC to decode the second code.
You won't know exactly how the digits are split, so you will have to try based on the flag format.
222 7777 222 8 333 0 444 0 8 2 7 7 33 3 0 999 666 88 777 0 7 44 666 66 33
CSCTF I TAPPED YOUR PHONE
The flag is case insensitive.
Flag:
CSCTF{I_tapped_your_phone}