End-to-end encryption is a type of data protection where information sent over the internet is encrypted at its source and only decoded at its destination. This prevents any third-party from viewing or accessing the data in-transit. It is necessary for protecting highly sensitive data or communications, such as financial transactions and other private conversations.

1. Establish a data protection strategy to determine what level of encryption you need.
2. Ensure your IT infrastructure is prepared to securely handle encryption.
3. Choose an encryption protocol and understand how to implement it.
4. Determine what type of encryption key(s) to use for your system.
5. Use a trusted third-party for encryption key management.
6. Educate your employees, customers, and partners on the importance of data protection and encryption.
7. Monitor usage and access in order to detect any suspicious activity.