Description

CryptxHDx (for tablets) is a convenient,simple-to-use proprietary text encryption platform that utilizesits own SQLite database for data archiving.

Data ciphering logic uses AES, the Advanced Encryption Standard,which is a 128-bit symmetric-key text encryption specification thatwas approved by the U.S. National Institute of Standards andTechnology in 2002, and is used by the U.S. government and otherinstitutions worldwide.

App features:
* 128-bit AES encryption using:
- SecureRandom() with 'SHA1PRNG' salt
- SecretKeyFactory() with 'PBEWithSHAAnd128BitAES-CBC-BC'
- Cipher() with 'AES/CBC/PKCS7Padding'
* User-supplied cipher key(s) up to 12 characters long
* No-limit recursive encryption
* Any character set (language) can be encrypted*
* No app restrictions to data manipulation size
* SQLite database for archiving (with search and sort)
* 'Share' and Clipboard-paste for forwarding
* Scrollable real-time 'on screen' Event Log
* Built-in Help file
* Note: This free version permits only 5 'folders' in thedatabase

By using other Android apps, your encrypted data can be postedon the Web or transmitted to other Android devices around theglobe. The destination receivers would use their own CryptxHDx app(see note below) and your previously-disclosed encryption key(s) todecipher the forwarded message.

If you don't distribute your cipher texts, then you can savethem in a SQLite database on your own Android tablet. Theinformation is stored in 'folders' where it can later beindividually retrieved and decrypted to reveal your oldconfidential notes. (A maximum of 5 'folders' are permitted withthis free app.)

NOTES: If you discover you need more than 5 'folders', downloadthe app: CryptxHD. The tablet-targeted CryptxHD and CryptxHDx apps,and the smartphone-targeted Cryptxphile and Crypt2phile apps mayall be used to decrypt any AES+ data file. Be aware that Triple-DESstrings can not be decrypted by the AES algorithm, and viceversa.

Caveat: Mix together enough mathematicians, cryptographers,CPU's, and research time in a computer lab and you'll discover anyencrypted text on planet Earth can be deciphered. Therefore, don'texpect to find an "uncrackability" guarantee with this app! But bycombining an off-the-shelf encryption algorithm with multipleprivate keys and unlimited recursion, hackers will be repulsed fromeven attempting to brute-force-attack your ciphered texts.

* Note1: the Unicode characters x2500-x256C are reserved fordata encoding!

Note2: This app uses the "menu" button...which is likely missingon the newer models of tablets and smartphones! Check which yourdevice manufacturer (via a Google search) to find out how thisbutton is now simulated.