Cryptography, Blind Signatures, Google, VPN, Privacy.
evil unblinded token to the Redemption Point, which does the validity check without suspecting a thing: given signed token: sig(m') = m^d / 2 given message: m' = m / 2^e check: m' == sig(m')^e which gives: m / 2^e == (m^d / 2)^e expanded: m / 2^e == m / 2^e So the Redemption Point sees this check