User's Manual

Merchant User Manual and Integration Guide May, 2005 127
17
Security
Notification Validation
Notification validation is the process you use to validate your IPN data. For more information
about Notification Validation, see “Notification Validation ” on page 106.
Button Encryption
If you choose Button Encryption in the Button Factory, which is the default value, your
website payments will be secure, thus both you and your customers remain protected. PayPal
automatically encrypts your confidential information using the Secure Sockets Layer (SSL)
protocol with an encryption key length of 128 bits (the highest level commercially available).
Your customers will not need to share their private financial information (e.g. credit card or
bank account numbers) during the transaction, so they can complete payment while retaining
security.
NOTE: Encrypting your button code is highly recommended, but doing so has three
limitations.
z The HTML code generated for an encrypted button will not be editable, so if you are
accustomed to modifying your button code manually, you may want to clear this option.
z You will not be able to encrypt your button if it has dynamically-generated code from the
Add More Options page, such as drop-down Option fields (see step 5). If you need Option
fields for your products, then you will want to turn encryption off by selecting No.
z Also, you cannot create an email link if you choose to encrypt your button.