Q1-what are the security and availability requirements for a system and business methods intended to be used by a company acting as a trusted third party, which will charge customers for certificating public cryptography keys to be used within a stocks and shares trading network involving many individual shareholders and many stock brokers?
Q2-If the business described in Q1 also provides a key revocation service, then what are the additional requirements for this. what are the limits to the guarantees which should be offered by the operator to users of a key revocation service?