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[Verizon] What does this mean?

Discussion in 'Android Devices' started by AppsRUs, Jan 5, 2012.

  1. AppsRUs

    AppsRUs Well-Known Member
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    MD5 Checksum.

    I keep seeing this everywhere, but what does it mean to me before I unlock/root my device? Do I have to change something somewhere? This is the only thing that's hanging me up from rooting because I don't have a clue what this means.
     

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  2. jbdan

    jbdan Android Expert
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    To make sure your download is secure. Use a free app (many of them) dnld to your PC and use to compare MD5's listed in dev's dnld's

    Taken from the web:


    MD5 is an algorithm that is used to verify data integrity through the creation of a 128-bit message digest from data input (which may be a message of any length) that is claimed to be as unique to that specific data as a fingerprint is to the specific individual. MD5, which was developed by Professor Ronald L. Rivest of MIT, is intended for use with digital signature applications, which require that large files must be compressed by a secure method before being encrypted with a secret key, under a public key cryptosystem. MD5 is currently a standard, Internet Engineering Task Force (IETF) Request for Comments (RFC) 1321. According to the standard, it is "computationally infeasible" that any two messages that have been input to the MD5 algorithm could have as the output the same message digest, or that a false message could be created through apprehension of the message digest. MD5 is the third message digest algorithm created by Rivest. All three (the others are MD2 and MD4) have similar structures, but MD2 was optimized for 8-bit machines, in comparison with the two later formulas, which are optimized for 32-bit machines. The MD5 algorithm is an extension of MD4, which the critical review found to be fast, but possibly not absolutely secure. In comparison, MD5 is not quite as fast as the MD4 algorithm, but offers much more assurance of data security.
     
  3. Yeahha

    Yeahha Usually off topic
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    For checking on your phone root explorer has it available but I personally like using AFV (Android File Verifier) It is free and from what I hear the dev is a really nice guy
     
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  4. AppsRUs

    AppsRUs Well-Known Member
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    Thank you so much for the responses! I thought it was something that needed to be altered. Good to know!
     
  5. binary visions

    binary visions Android Expert
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    I don't know, I always thought he was a bit of an a**hole.

    His code probably sucks, too. I bet it's stealing bank account numbers and passwords.

    :D
     
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  6. Yeahha

    Yeahha Usually off topic
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    :eek:
    With how much he has helped out here by setting up stickys and helping people root I am gonna say I think you are wrong. I've even seen him come into a thread and fix all the wrong info I have given out...:eek:
    by accident of course
     
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  7. binary visions

    binary visions Android Expert
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    I know, I'm just giving him a hard time ;)
     
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  8. scary alien

    scary alien not really so scary
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    space alien ;)
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    :) :) :)

    :eek: :p :D

    Oh, purely by accident, of course ;) :).

    LOL / LMAO, and thanks guys!

    (I love you, too! :))
     
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  9. Yeahha

    Yeahha Usually off topic
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    Shoot he saw :p

    And yes it has been by accident, I accidently didn't make the connection that the bootloader and recovery are not part of the same img ...:eek:
    We should see get a copy of that recovery-from-boot.p file (or whatever it is named) and link to it in the stickys that way if someone is on the stock rom and wants to get back to the stock recovery but they deleted the file they can just download it
     
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  10. scary alien

    scary alien not really so scary
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    Yeah, both good ideas (of course!).

    I don't think I ever saw the recovery-from-boot.p file on my VZW phone? (only on the GSM versions?)

    I could also extract, attach / post the recovery.img files for each version of the phone and include it in the how to restore the stock recovery (I'll do that :)).

    Also, to AppsRUs, you can also easily calculate the MD5 sum on your phone via my app or by Astro File Manager (navigate to the file, long-press filename, choose Details (larger files will take a few seconds to calculate the MD5 sum)).

    Also, here's a thread with more/other information about how to check MD5 checksums on both your phone and PC:

    http://androidforums.com/faqs/443074-md5-verification.html

    Cheers!
     
  11. Yeahha

    Yeahha Usually off topic
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    I had it on mine when I first rooted. I can restore the backup and rename the file back and copy it.

    I am begining to think you just enjoy writing how-to posts :p
     
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  12. scary alien

    scary alien not really so scary
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    LOL, I kinda do ;) :).

    I'll grab it...its been bugging me since day one :p.
     
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  13. Yeahha

    Yeahha Usually off topic
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    I'm glad someone does ;)

    Okay, if you need me to pull it or anything just let me know.
     
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