Security is probably one of the most significant concerns for both the client and myself during an online transaction. In reality an online transaction is probably more secure than a card transaction in a shop or conducted over the telephone or by fax, as the information transmitted online is highly encrypted using complicated logarithm combinations.
The WorldPay payment system uses a combination of both established and innovative techniques to ensure the security and integrity of all sensitive data. Furthermore, WorldPay's web servers are certified by Thawte, a public Certificate Authority, ensuring that both the client and I may have confidence that nobody can impersonate WorldPay to obtain confidential information.
The transfer of the purchase details from the Uktaxadvisor website to WorldPay is encapsulated using WorldPay's own encrypted and digitally-signed protocol. This uses a combination of standard methods such as PGP, RSA and MD5 to ensure that the information passed is secure and tamper-proof.
Data storage on WorldPay systems, and the communication between WorldPay and the worldwide banking networks, is regularly audited by the banking authorities to ensure a secure transaction environment. WorldPay also ensure that they stay up-to-date with the latest versions of any third-party code they use, and continually review their own proprietary code.