All three PK schemes work with the descriptors and I’ve added TFM to the list of descriptors. Some prelim performance data for RSA-1024 private key operations yielded me AMD64=”LTC+TFM=1738/sec, OpenSSL=1387/sec”, P4=”LTC+TFM=392/sec, OpenSSL=136/sec”. So it’s just a “tad” faster. UPDATE I’ve <a href=perdy2.png>uploaded</a> a chart of TFM vs. LTM vs. SSL for RSA private key operations various RSA key sizes. Note that OpenSSL only “out of the box” can test 1024 and 2048 bit RSA keys… But you can clearly see who is on top. As suspected I have some tuning to do to make TFM a bit more scalable but it never fails to outperform LTM which makes me happy.