this a very good tutorial on cryptography in Android mobile system you it to learn more

TutorialOnCrypto\.classpath
................\.project
................\.settings\org.eclipse.jdt.core.prefs
................\AndroidManifest.xml
................\bin\AndroidManifest.xml
................\...\classes\cliu\tutorialoncrypto\AsymmetricAlgorithmRSA.class
................\...\.......\....\................\BuildConfig.class
................\...\.......\....\................\ListCryptoAlgorithms.class
................\...\.......\....\................\R$attr.class
................\...\.......\....\................\R$drawable.class
................\...\.......\....\................\R$id.class
................\...\.......\....\................\R$layout.class
................\...\.......\....\................\R$string.class
................\...\.......\....\................\R.class
................\...\.......\....\................\SymmetricAlgorithmAES.class
................\...\.......\....\................\TutorialOnCrypto$1.class
................\...\.......\....\................\TutorialOnCrypto$2.class
................\...\.......\....\................\TutorialOnCrypto$3.class
................\...\.......\....\................\TutorialOnCrypto.class
................\...\classes.dex
................\...\dexedLibs\annotations-183c36c6856246b6addb73fc2b5aaa7c.jar
................\...\jarlist.cache
................\...\res\crunch\drawable\icon.png
................\...\...\drawable\icon.png
................\...\resources.ap_
................\...\TutorialOnCrypto.apk
................\gen\cliu\tutorialoncrypto\BuildConfig.java
................\...\....\................\R.java
................\lint.xml
................\project.properties
................\res\drawable\icon.png
................\...\layout\algs.xml
................\...\......\asym.xml
................\...\......\examples.xml
................\...\......\symm.xml
................\...\values\strings.xml
................\src\cliu\tutorialoncrypto\AsymmetricAlgorithmRSA.java
................\...\....\................\ListCryptoAlgorithms.java
................\...\....\................\SymmetricAlgorithmAES.java
................\...\....\................\TutorialOnCrypto.java
................\TutorialOnCrypto.zip
................\bin\classes\cliu\tutorialoncrypto
................\...\res\crunch\drawable
................\...\classes\cliu
................\...\res\crunch
................\...\...\drawable
................\gen\cliu\tutorialoncrypto
................\src\cliu\tutorialoncrypto
................\bin\classes
................\...\dexedLibs
................\...\res
................\gen\cliu
................\res\drawable
................\...\drawable-hdpi
................\...\drawable-ldpi
................\...\drawable-mdpi
................\...\drawable-xhdpi
................\...\layout
................\...\values
................\src\cliu
................\.settings
................\assets
................\bin
................\gen
................\res
................\src
TutorialOnCrypto

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