Re: [Ace] Asymmetric signature performance

On 2/8/2017 10:56 AM, Panos Kampanakis (pkampana) wrote: One correction: 1024-bit RSA/DSA is not the same security level as 256-bit curve ECDSA or Ed25519. But neither is a group symmetric key of any sized used for authentication/authorization. The point is that weaker but good enough

Re: [Ace] Asymmetric signature performance

On 2/8/2017 8:19 AM, Mohit Sethi wrote: Hi Mike At least with our measurements on an 8-bit microprocessor platform, 1024-bit RSA exponentiation was extremely slow. Please have a look at Table 1: https://tools.ietf.org/html/draft-ietf-lwig-crypto-sensors-01 I look at Table 1 the first

Re: [Ace] Asymmetric signature performance

On 2/8/2017 7:56 AM, Somaraju Abhinav wrote: Hi Mike, the signature size of RSA is an issue even in the 1024 bit version. The main wireless protocol, 802.15.4 has a PHY/MAC packet size of 127 bytes so we will have to fragment IP packets (Bluetooth LE is even smaller at just 27 bytes). This

Re: [Ace] Asymmetric signature performance

Somaraju Abhinav writes: > Hi Mike, > > the signature size of RSA is an issue even in the 1024 bit version. The main > wireless protocol, 802.15.4 has a PHY/MAC packet size of 127 bytes so we will > have to fragment IP packets (Bluetooth LE is even smaller at just

Re: [Ace] Asymmetric signature performance

One correction: 1024-bit RSA/DSA is not the same security level as 256-bit curve ECDSA or Ed25519. To compare apples to apples you would need 3072-bit RSA/DSA sigs which ends up being far worse in terms of sig size and performance. Agreed that symmetric group key auth has plenty of limitations.

Re: [Ace] Asymmetric signature performance

Hi Mike At least with our measurements on an 8-bit microprocessor platform, 1024-bit RSA exponentiation was extremely slow. Please have a look at Table 1: https://tools.ietf.org/html/draft-ietf-lwig-crypto-sensors-01 Also, a lot of research in the crypto community is now on faster and more

Re: [Ace] Asymmetric signature performance

Hi Mike, the signature size of RSA is an issue even in the 1024 bit version. The main wireless protocol, 802.15.4 has a PHY/MAC packet size of 127 bytes so we will have to fragment IP packets (Bluetooth LE is even smaller at just 27 bytes). This makes it very difficult to meet the time to