Authenticity Boundary

Verify Toy Signature

Verify a toy raw RSA signature by raising it to e. This is toy arithmetic only, not deployable security.

cryptography The values in this lesson are deliberately tiny so every modular arithmetic step can be checked exactly.

Example

Verify a toy raw RSA signature by raising it to e.

highlighted = computed this step

Step 1 — Set up

Set up the exact toy cryptography values.

signature, e, n(2, 3, 55)\begin{array}{c|c}\text{signature, e, n}&\text{(2, 3, 55)}\end{array}

Step 2 — Representative

Compute the highlighted cryptography value.

s power e mod n8\begin{array}{c|c}\text{s power e mod n}&\hlmath{\text{8}}\end{array}

Step 3 — Verdict

Compute the highlighted cryptography value.

verdictvalid toy signature\begin{array}{c|c}\text{verdict}&\hlmath{\text{valid toy signature}}\end{array}