ContactShield protects your contacts from applications that have access to that data and from attempts to hack into your address book, even on a cloud server. After the installation non of your contact is encrypted. At this point you can choose between individual contacts or the entire address book.
With a single tap, you can encrypt your contacts and select which specific fields to protect (for example, phone numbers, addresses, e-mails, notes).
After verifying your password/fingerprint, standard address book operations such as making phone calls, sending SMS messages and e-mails, are available on ContactShield, even if the contacts data is encrypted.
Synchronization with your cloud (Exchange, Google, etc.) encrypts the data on the cloud server. Now your cloud and iOS data will both be protected.
How does it work?
Tapping on ContactShield's lock icon simply encrypts the data on your iOS address book, not on ContactShield. ContactShield does not keep a copy of your address book. At launch, it reads your contacts and decrypts (unlocks) the relevant data without storing any private data. Your address book stays protected at all times.
Because ContactShield makes the data available for use in a non-encrypted format, access to ContactShield itself is protected by a Touch ID or password. Even If your address book (mobile device or cloud server) is compromised, you are safe. The data you selected to encrypt is secured with an AES 256-bit encryption algorithm. (In June 2003, the U.S. Government announced that AES could be used to protect classified information.)
Do not modify the encrypted data on your address book! Changing this data will prevent ContactShield from decrypting (unlocking) it!
64 bits, optimized for iOS 8.xx and iPhone 6/iPad Air (runs on iPhone 5s and higher).
"If you are using applications that read your iOS address book,
ContactShield is a must!" - ES
A phone number and Notes are protected on
ContactShield and iOS address book