Re: Key security problem

2009-10-27 Thread Patrick Patterson
Hi Peter: On October 26, 2009 10:37:54 pm Peter Lin wrote: > Thanks all guys for your opinion. > > There is a HSM used which vendor provides hardware RSA encryption and > decryption. However, the key of to the hardware is one way-- I can only > pass in the key to the hardware, but cant pass out. D

Re: Key security problem

2009-10-26 Thread Peter Lin
Thanks all guys for your opinion. There is a HSM used which vendor provides hardware RSA encryption and decryption. However, the key of to the hardware is one way-- I can only pass in the key to the hardware, but cant pass out. Due to the low performance of the hardware decryption, I decide to use

Re: Key security problem

2009-10-26 Thread Patrick Patterson
Peter Lin wrote: > Hi folks, > > I have a problem about key security. > > If a RSA private key is encrypted by an AES key, which is again encrypted by > the same RSA private key itself, is this considered as a secure procedure? > Obtaining the encrypted RSA private key and the AES key, is there a

RE: Key security problem

2009-10-26 Thread David Schwartz
Peter Lin wrote: > The reason for this strange design is that, the plain text RSA > private key is stored in some hardware chip which can only do > en/decryption but cannot pass the key out. However, I need to > save a copy of the private key in a unsafe place for other > purpose, but need to mak

RE: Key security problem

2009-10-26 Thread P G Kamath
By encrypting using RSA private key, you have gained nothing - because anyone can decrypt using the corresponding Public Key. If you encrypt using the Public Key, how would you decrypt? You have a chicken-egg problem. Not sure if encrypting using AES key (only) is considered secure enough but