Bottomley: Using Elliptic Curve Cryptography with TPM2
Bottomley: Using Elliptic Curve Cryptography with TPM2
Posted Oct 16, 2017 15:17 UTC (Mon) by MattJD (subscriber, #91390)In reply to: Bottomley: Using Elliptic Curve Cryptography with TPM2 by Wol
Parent article: Bottomley: Using Elliptic Curve Cryptography with TPM2
> I believe that with RSA you publish PQ (the product of your two big primes) as part of your public key. Crack that PQ, and EVERYBODY who is using that PQ has had their key broken. Which is why most people calculate their own PQ.
To be clear, P and Q are basically the secret of an RSA key (technically there is a third value, d, but that can be easily computed from the P, Q, and the e value in the public certificate). People use a different P and Q (and thus PQ value) as otherwise they would be basically sharing keys.
Note that actual RSA keys are described slightly differently, but doesn't change the fact people can't share a P and Q.