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I like crypto. Need I say more?


14h
comment Burn after read algorythm. Software verification on compromised environment. Software smart card
You might find this paper interesting.
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comment Usage of different size chunks during AES encryption/decryption
Glad we figured it out. In your learning, please feel free to continue using this site to help you. I'd suggest you read the help center on the types of questions that are on topic here.
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comment Is it possible to track down copies of WW2-era codebooks?
Perhaps the NSA has some? nsa.gov/about/cryptologic_heritage/museum
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answered Leaving authentication data blank less secure for AES GCM?
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revised Usage of different size chunks during AES encryption/decryption
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revised Usage of different size chunks during AES encryption/decryption
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answered Usage of different size chunks during AES encryption/decryption
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comment Usage of different size chunks during AES encryption/decryption
That's your problem then. I'll write up a detailed answer.
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comment Usage of different size chunks during AES encryption/decryption
What IV do you use when you attempt to encrypt the next chunk?
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comment Usage of different size chunks during AES encryption/decryption
What are you using as the IVs? For CBC the "IV" for the next block of data is the previous block of ciphertext. Therefore, if you generate a new IV for each chunk, but then just try to put chunks together to decrypt, you will have problems.
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comment Usage of different size chunks during AES encryption/decryption
If I get some time, I'll write up an explanation of why it doesn't work. I'm curious. Why even split into chunks at all? Does a user ever need to access less than the whole file?
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comment Usage of different size chunks during AES encryption/decryption
In general, no, it will not work. What are you trying to gain by doing that? If you explain your requirements, there may be something else we can point you towards to help. In other words, instead of describing a solution to your problem, why not tell us your problem.
Apr
18
comment RSA algorithm , decrypting a message
This question appears to be off-topic because it is about encoding schemes not cryptography.
Apr
18
comment RSA algorithm , decrypting a message
That depends on how the person who encrypted the message did the encoding. We have no idea. A good guess would be ascii.
Apr
18
comment Decrypting a small Message using RSA with a Private Key
In step 9, why are you raising to the 3?
Apr
16
comment What happens if biometric data is stolen?
There has been some work where your biometric is used as your public key. Then it doesn't matter if your biometric data is stolen as that is your public key. It uses IBE under the hood and some other things to deal with the fuzziness of biometrics.
Apr
16
comment Could program verification techniques prevent bugs of the genre of Heartbleed from occurring?
@Gilles, I sent it your way to CS. Probably should have the comments wiped (give you a clean slate there).
Apr
15
comment Decrypt Passwords based on using a user's password
I'm going to migrate your question over to IT Security as I think you'll get better attention there. While it relates to crypto, our site is primarily about the theoretical aspects of cryptography. IT Security is a much better site for something like this. Head over there and register for an account so you can track answers, etc.
Apr
15
comment Decrypt Passwords based on using a user's password
Let me see if I get this straight. The employee enters their password which gives them the key to encrypt/decrypt the customer's password. All employees will likely have different passwords though, correct?