Any document or guidance for new one to use your BLS lib?

[songlinjian]

Any document or guidance for new one to use your BLS lib?

[asonnino]

Hi songlinjian,
You can find the doc of the repo with an example here: https://bls-lib.readthedocs.io/en/latest/?badge=latest

The basic usage works as follows:

>>> m = [3] * 2 # messages
>>> t, n = 2, 3 # number of authorities
>>> params = setup() # generate the public parameters.
>>> (sk, vk) = ttp_keygen(params, t, n) # generate key
>>> aggr_vk = aggregate_vk(params, vk) # aggregate verification keys
>>> sigs = [sign(params, ski, m) for ski in sk] # sign
>>> sigma = aggregate_sigma(params, sigs) # aggregate credentials
>>> assert verify(params, aggr_vk, sigma, m) # verify signature

For threshold signing, you also need a distributed key generation algorithm (modelled by ttp_keygen in this repo); eg Gennaro et. al. and Kate et. al. If you would like to chat more about distributed keyGen, don't hesitate to contact me offline ([email protected]).

Please note that this repo is really an "academic prototype" designed to get familiar/play with BLS and build prototypes with little effort -- do not use it for production.

[songlinjian]

Thanks I will look into it. I just play it around in a testbed.

Hi songlinjian,
You can find the doc of the repo with an example here: https://bls-lib.readthedocs.io/en/latest/?badge=latest

The basic usage works as follows:

>>> m = [3] * 2 # messages
>>> t, n = 2, 3 # number of authorities
>>> params = setup() # generate the public parameters.
>>> (sk, vk) = ttp_keygen(params, t, n) # generate key
>>> aggr_vk = aggregate_vk(params, vk) # aggregate verification keys
>>> sigs = [sign(params, ski, m) for ski in sk] # sign
>>> sigma = aggregate_sigma(params, sigs) # aggregate credentials
>>> assert verify(params, aggr_vk, sigma, m) # verify signature

For threshold signing, you also need a distributed key generation algorithm (modelled by ttp_keygen in this repo); eg Gennaro et. al. and Kate et. al. If you would like to chat more about distributed keyGen, don't hesitate to contact me offline ([email protected]).

Please note that this repo is really an "academic prototype" designed to get familiar/play with BLS and build prototypes with little effort -- do not use it for production.

[songlinjian]

After I installed bls-lib. I run the basic-usage code you proposed. There is a error msg :

File "/usr/local/lib/python3.5/dist-packages/bls/utils.py", line 36, in hash
Cstring = b",".join([str(x) for x in elements])
TypeError: sequence item 0: expected a bytes-like object, str found