Re: DIS: [proto] the Ansible
On 8/4/2019 3:21 PM, Jason Cobb wrote: > I'd say just enumerate the acceptable algorithms. You could probably just > start with SHA256 - it's secure and easy to find calculators for online. lol sure I suppose there's no point in coming up with an elegantly-crafted general definition (as pretty as it might be) if it just amounts to "use SHA 256 or higher".
Re: DIS: [proto] the Ansible
On 8/4/19 6:17 PM, Kerim Aydin wrote: On 8/4/2019 3:10 PM, Jason Cobb wrote: On 8/4/19 6:09 PM, ais...@alumni.bham.ac.uk wrote: On Sun, 2019-08-04 at 14:55 -0700, Kerim Aydin wrote: [* do we need to define what a "hash method" is or is that in common-enough use to leave to common definitions?] Fun though it would be to scam this myself, in the spirit of "catch loopholes rather than exploit them": the common definition of "hash method" is not what you're actually looking for here. (In particular, you probably want to confine to hashes with collision resistance, otherwise someone could prepare multiple plaintexts in advance and choose which to show based on events since.) I hereby define the TenHash hashing method: The hash is, and always will be, 10. I also just realized that I didn't require the hashing method to be generally computable by anyone with reasonable effort and the provided information, under this someone could use a method that requires secret info. So: I can give it a try, but if someone more expert than me wants to have a go at a definition, I'd love that! -G. I'd say just enumerate the acceptable algorithms. You could probably just start with SHA256 - it's secure and easy to find calculators for online. -- Jason Cobb
Re: DIS: [proto] the Ansible
On 8/4/2019 3:10 PM, Jason Cobb wrote: On 8/4/19 6:09 PM, ais...@alumni.bham.ac.uk wrote: On Sun, 2019-08-04 at 14:55 -0700, Kerim Aydin wrote: [* do we need to define what a "hash method" is or is that in common-enough use to leave to common definitions?] Fun though it would be to scam this myself, in the spirit of "catch loopholes rather than exploit them": the common definition of "hash method" is not what you're actually looking for here. (In particular, you probably want to confine to hashes with collision resistance, otherwise someone could prepare multiple plaintexts in advance and choose which to show based on events since.) I hereby define the TenHash hashing method: The hash is, and always will be, 10. I also just realized that I didn't require the hashing method to be generally computable by anyone with reasonable effort and the provided information, under this someone could use a method that requires secret info. So: I can give it a try, but if someone more expert than me wants to have a go at a definition, I'd love that! -G.
Re: DIS: [proto] the Ansible
On 8/4/19 6:09 PM, ais...@alumni.bham.ac.uk wrote: On Sun, 2019-08-04 at 14:55 -0700, Kerim Aydin wrote: [* do we need to define what a "hash method" is or is that in common-enough use to leave to common definitions?] Fun though it would be to scam this myself, in the spirit of "catch loopholes rather than exploit them": the common definition of "hash method" is not what you're actually looking for here. (In particular, you probably want to confine to hashes with collision resistance, otherwise someone could prepare multiple plaintexts in advance and choose which to show based on events since.) I hereby define the TenHash hashing method: The hash is, and always will be, 10. -- Jason Cobb
Re: DIS: [proto] the Ansible
On Sun, 2019-08-04 at 14:55 -0700, Kerim Aydin wrote: > [* do we need to define what a "hash method" is or is that in > common-enough use to leave to common definitions?] Fun though it would be to scam this myself, in the spirit of "catch loopholes rather than exploit them": the common definition of "hash method" is not what you're actually looking for here. (In particular, you probably want to confine to hashes with collision resistance, otherwise someone could prepare multiple plaintexts in advance and choose which to show based on events since.) -- ais523
