Re: [TLS] Dumb thoughts for hardware backed keys for AEAD
Tony Arcieri <bascule@gmail.com> Tue, 01 December 2015 03:11 UTC
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From: Tony Arcieri <bascule@gmail.com>
Date: Mon, 30 Nov 2015 20:10:58 -0700
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To: Bill Cox <waywardgeek@google.com>
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Subject: Re: [TLS] Dumb thoughts for hardware backed keys for AEAD
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On Mon, Nov 30, 2015 at 7:07 PM, Bill Cox <waywardgeek@google.com> wrote: > However, there are overhead costs for moving data in/out of these > execution zones, and overhead when switching back and forth. Execution > speed is a little slower in these modes for various reasons. For maximum > speed, I might want a separate HMAC/HKDF key besides the read/write keys. > That way, I keep just the HMAC/HKDF key in a secure execution zone, and > only have to do one small operation with it per AEAD call per TLS record. > Have you measured the overhead of performing just the private key operations of TLS using a key stored in an SGX enclave versus the same operations outside an SGX enclave? I'd be curious what the actual performance impact is. -- Tony Arcieri
- [TLS] Dumb thoughts for hardware backed keys for … Bill Cox
- Re: [TLS] Dumb thoughts for hardware backed keys … Eric Rescorla
- Re: [TLS] Dumb thoughts for hardware backed keys … Tony Arcieri
- Re: [TLS] Dumb thoughts for hardware backed keys … Bill Cox
- Re: [TLS] Dumb thoughts for hardware backed keys … Eric Rescorla
- Re: [TLS] Dumb thoughts for hardware backed keys … Bill Cox
- Re: [TLS] Dumb thoughts for hardware backed keys … Ilari Liusvaara