Android :: Recommended Encryption Combination For Digital Signatures
Jul 3, 2010
I have finally - after days and days of agony - figured out that I need two forms of encryption for my Digital Signatures Project. The first will will be symmetric (AES) and will encrypt the license data and the second will be a asymmetric (RSA) an will encrypt the symmetric key. Can someone give me pointers on the best methods to use for Android.
For the public/private keys I am using: "RSA/ECB/PKCS1Padding"(I head ECB is bad so what should I use?, what about the PKCS1Padding - shoudl I be using PKCS5Padding?)
For the symetric keys I will probably use: "AES/?/?" (What mode and padding should I use?)
The provider: "BC"
RSA Keysize: 1024 (I tried 2048 but it didn't work for some reason)
AES Keysize: ?
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Aug 20, 2010
I haven't seen a post on this in a while. Does anyone have a list of recommended or not recommended browsers? Maybe some pros and cons of each.
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Feb 4, 2010
How to customize the signature blocks in the email programs? I have my home email and the gmail account for the phones and I would like to make a custom signature for outgoing mail. any suggestions or can this be done?
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Apr 14, 2009
Out put by eclipse: CODE:.. adb uninstall com.android.music say Failure.
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May 20, 2010
I've got a database. In its "tags" column, rows can have a combination of multiple values "A, B, C"--such that: row 1 has "A" row 2 has "A, C" row 3 has "B, A" and so on, in various permutations. I am trying to implement search using a managedQuery such that I can return a cursor that contains rows with one or more values in the query. For example, if the user enters "C, A" for a search, s/he should get all rows that have A, C, or A and C. I'm splitting the user query on the comma (",") character, and the final call is as follows (parameters replaced by actual values):
mActivity.managedQuery("content_uri", [id, title, tags], "title LIKE ? OR tags LIKE ?", [%A% OR %C%, %A% OR %C%], "title ASC")
Even though there are rows in the database that contain A, C, or A and C--the managedQuery returns nothing. Thankfully, if the query is for "A", or for "C", the appropriate rows with "A" or "C" or "A and C" are returned. It's just that a query with more than one search term returns nothing. What am I doing wrong here? My guess is that %A% OR %C% is incorrect logic, but why?
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Oct 19, 2010
we are confused with designing interface file for android,we have made user interface with Absolute layout and used "dip" instead of "px" (for different screen size issue) ,but it looks like,Absolute layout has been depreciated,and developer.android, recommends not to use Absolute layout
So other option we have is to use
1.Linear layout
2.Frame layout
3.Table Layout
But we are unable to bring Combination of above layouts so,that we can make button/widgets to proper position we need
How do we make widgets to desired position of screen with above said layouts and making them compatible with different screen sizes we have in android devices
would like to get a generic answer about same,
Tools used are: DrawDroid
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Feb 12, 2010
A WAP PUSH receivers defines permissions & I've seen in some cases, they uses signatures in manifest files. Q: Can a intent-filter use any string as a mime type or the mime types must be pre-register(Accepted) somewhere in system?
Q: What about the permissions? Who is really granting these permissions?
e.g.: <uses-permission android:name="android.permission.RECEIVE_WAP_PUSH"/> <intent-filter> <action android:name="android.provider.Telephony.WAP_PUSH_RECEIVED" /
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May 22, 2010
I moved my Android project to a laptop and now I get this when I hit Debug. Sounds like this is a bug? This shouldn't happen via Eclipse as far as I know. Re-installation failed due to different application signatures. The weirdest thing is this happened after I upgraded sdk/adt and Eclipse to support SDK 2.2 It was working fine earlier, and now it doesn't, so it might be a bug.
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Oct 1, 2010
I have an Java class with a static final method getAll:
CODE:..............
Now I want to hand in null as a value for the where statemant so that it will just be ignored later on in the code. Anyway in the testcase for this method I have: Vector<Category> categories = Category.getAll(context, null);
Which then in turn gives me a NoSuchMethodError. I don't know exactly why it does that. The only thing I could imagine is that the null I hand in would not match the signature of the above method. But how can I overcome this? I already thought of overloading. But this would just end in rewriting most of the code. At least when I do it, how I think.
This is the stack trace I get:
CODE:.......................
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Nov 24, 2010
I have written a TestSuite to find out how to calculate the rotation angles from the data you get in SensorEventListener.onSensorChanged(). I really hope you can complete my solution to help people who will have the same problems like me. Here is the code, i think you will understand it after reading it. Feel free to change it, the main idea was to implement several methods to send the orientation angles to the opengl view or any other target which would need it. method 1 to 4 are working, they are directly sending the rotationMatrix to the OpenGl view. method 6 works now too, but i have no explanation why the rotation has to be done y x z.. all other methods are not working or buggy and i hope someone knows to get them working. i think the best method would be method 5 if it would work, because it would be the easiest to understand but i'm not sure how efficient it is. the complete code isn't optimized so i recommend to not use it as it is in your project. Code...
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Feb 22, 2012
Any app that combines messages coming from multiple apps such as messages, gtalk, voice..etc? Why the hell it hasn't been implemented yet as part of the phone? I am really tired of having to switch between every app during a particularly busy message binge.
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Mar 6, 2013
I have a Verizon USB modem. Is there an android tablet I can buy that will work with my USB modem? I would rather not get an embedded 3G/4G tablet. I want the functionality to be able to use the USB modem in my current Windows laptops as well.
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Jul 2, 2010
I like how you can add signatures to emails now on 2.2, but how about for SMS? Is there a program/app available to do that?
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Aug 31, 2010
Just got sent a new droid 2 replacement for my droid 1 because the screen died. After setting all up I went to do my signatures for my work exchange account and a regular yahoo account but it make you use the same signature for both accounts (when doing signature box it states it will apply to all email accounts). I need a specific signature for work and just a simple for yahoo. Is there a way to have different signatures for email addresses? I had separate signatures on my droid 1.
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Jul 23, 2010
How to set up signatures on the K-9 mail program on my DroidX.
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Nov 8, 2011
How do you know that an APK signature is not a fake?
What is to stop somebody unpacking an APK, inserting malicious code, repacking the APK, and signing it with a new key that simply copies all of the fields from the original publishers key (company name, locations, etc...)? Obviously it is not the same key, but all of the data the end user would see appears to be the same.
If the original key had to be signed by a trusted authority (as is the case with trusted ClickOnce applications for instance), you could have some certainty that this key was issued to the original company. Similarly, if publishers made their public keys available from a trusted outlet (e.g. google.com/android/keys) you could check that they were correct from the fingerprint.
It would appear that signing only gives you the illusion of security, which is actually worse than no security at all.
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Jul 19, 2010
i saw that there isn't an easy way to do this with the incredible but does anyone know if there a screencapture for the droidx? maybe a combination of keys on the phone like a computer?
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Apr 21, 2014
I have a Galaxy S5 with 4.4.2. I dont recall if this happened when I had my S4 but this is my issue. When I am in my car and connected to the cars bluetooth, whenever I want to speak to google to do a search or something it goes through the bluetooth of the car. This would be fine but sometimes it waits like 2-3 seconds until the bluetooth in car picks up and messes up my train of thought. I would like to make the voice search not use the bluetooth when connected.
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Oct 17, 2010
I really hate the 'Sent from my iPhone' signature (I have some extra hate for Apple ) and looking from some witty signature to send on the Droid X to all my Apple fanboy/friends.
Looking for something like:
Sent from my 'Steve Jobs controlled'-free phone
or
Not sent from my iFail
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Sep 9, 2010
I just bought an xperia white, mostly because i heard it was a decent starter smart phone and because it was the best one my provider offered. i was fooling around with it on lunch and added a signature to my texts and now WHENEVER i text for EVERY single text, my name comes up beside it. i've only found one thread about it on the forums, and there was no solution. I like the versatility and styling of the OS texting, and tbh absolute hate the handcent styling. Not to mention i don't really want to have two competing messaging apps on my phone at once..
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Sep 2, 2010
I have two e-mail accounts, 1 SBC and one an Exchange Server. When I set up my signature (for work), it seems to put that signature for both accounts. Is there a way to seperate the signature lines for each email account? I tried deleting it from my home account and it will delete it from both. there seems to be no separation.
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Oct 8, 2011
A boot loop happen after i tried installing cyanogenmod 7 early realease from this forum. Now the device stuck in boot and will display cyanogenmod 7 blue circle around 3 -4 seconds over and over. I need to do a factory reset, but now it stuck in boot loop and it does not have a key combination to go into recovery mod.
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Apr 1, 2010
Haven't done the update yet. I'm not just talking about text sigs, but .jpg also. This has always been an irritation that I counldn't have my .jpg sig when sending from my phone.
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Apr 8, 2010
I'm look for an app that will encrypt my SD card. I don't want to worry about losing my phone and the finder having access to the information on my SD card. I know it'll slow the phone down.
'Gallery Private' in the market looks like it may do this. Does anyone have experience with this app? Does it only encrypt pictures and folders?
'B-Folders+sync' looks like it only does contacts and notes. I may need a combination of them both.
Makes me sort of wish there was a BitLocker-esque app available.
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Feb 9, 2011
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Jan 7, 2010
I'm trying to use BouncyCastle with android to implement ECDH and EL Gamal. I've added the bouncycastle jar file (bcprov-jdk16-144.jar) and written some code that works with my computers jvm however when I try and port it to my android application it throws: java.security.NoSuchAlgorithmException: KeyPairGenerator ECDH What am I doing wrong?
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Jun 23, 2010
I want to know why SQLite doesn't support encryption! & How to secure the SQlite db on a Android app?
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Feb 2, 2010
I am developing an app that uploads files to an FTP server, and the app will have the ftp user name / password in the code. I'm investigating making the FTP user name and password as secure as possible (including an encrypted value for each in a strings.xml and decrypting in the app when it needs to connect to the FTP server).
My concern is this is not actually secure at all, it seems someone could unzip the .apk, decompile it, view the strings.xml and java code that decrypts it - and thereby obtain the ftp login info.
So my question is.. am I approaching this wrong way? Is there a standard method of ensuring passwords that are hard coded into an app can be secure? (note - in this case this is not a password a user of the app would enter, the FTP password is universal to all that install it so it is included in the app).
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Aug 26, 2009
I wrote a small application which encrypt some files using a secret key. i need to decrypt files on 2nd run which requires same key again plz advise where should i store the secret key.
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Jan 18, 2010
I have been using LibTomCrypt to use SHA1 encryption ( for data integrity checking ) on mobile devices (iPhone OS and Android for the moment ). I was wondering if anyone is using anything else, things to consider are Portability ( C preferred but C++ is also an option ), and libraries size ( small == better for my particular needs ).
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