Security

One of the biggest problems with the internet today is security and establishing identity. Whilst the management of internet applications remains with large, centratlised profit based coompaines it is dificult to see how the situation will improve. The aim of local net is to put managemnt into the hands of local people so identity can be established through personal contact.

Symmetric Keys

Asymmetric Keys

• K - public Key
• k - private key
• t - plain text
• c - cipher

Encryption

Holder of the Public Key sends a message to the holder of the private key.

c = e(K,t)
t = d(k,c) = d(k,e(K,t))

Signing

Any holder of the Public Key can verify it was sent by the holder of the private key.

c = e(k,t)
t = v(K,c) = v(K,e(k,t))

Public Ket Infrastructure (PKI)