Lab TCP — Cryptanalysis Laboratory

LABORATORY / 6

Online classroom · 6 laboratories · 265 English exercise files

Statistics

Ciphertext vs English reference

Ciphertext		Reference
Symbol	%	Symbol	%

Ranked independently. English reference frequencies come from the supplied teaching corpus. A frequent symbol is a clue, not a proven substitution.

1. Choose your laboratory variant

DatasetVariant Exercise Import your own text (optional)File encoding

Progress saves automatically in this browser.

Ciphertext / plaintext for an experiment

Open the step-by-step guide for this lab

2. Test a hypothesis

Plaintext / analysis result

Select an action to begin.

3. Explain your result

Student label and group (optional)Hypotheses, recovered key and conclusion

Resume from protocol

Protocol text / manual backup

Copy this JSON as a backup, or paste a saved protocol here

The protocol records your experiments and conclusion. You can continue here without downloading anything. Work is saved in this browser on this device. It is not submitted to your instructor automatically.