IT Security Stack Exchange
IT Security Stack Exchange

Questions tagged [decryption]

The process of decoding data that has been encrypted into a secret format.

393 questions
11
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5 answers

What will I get if I "decrypt" a plaintext?

If an encrypted text is decrypted with its corresponding key, we would get the plaintext. However, what if I were to decrypt plain text? What would result? An error or some nonsensical number?
weejing
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2
votes
2 answers

Decrypt files in safe environment

I have a USB drive that has encrypted files on it. I was wondering what would be the best way for me to decrypt these files on my personal computer without leaving a trace? Is there a safe environment that once setup would leave no trace of my…
Mike
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1
vote
1 answer

How come keys can stay secure through factorization of primes

Sooo I under n=pq where p and q are both large primes so it making factorizing them inefficient to the point of impossible but there must a a list of prime sets (heard people call them trap doors I think?) That are well know? Like if p and q are…
Gift Cardholder
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1
vote
0 answers

Understanding Base64 decoding

I have found following string in one of the CTF walkthrough. But I could not understand 1274* string in the code. what is the significance of 1274* in below code? 1274* echo "iVBORw0KGgoAAAANSUhE....ErkJggg==" | base64 --decode > image.png
sivakumar arani
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0
votes
1 answer

Decrypt .enc file with .key file

I'm trying to decrypt JPEG and MP4 files (basically, media files) which they end in .enc file extension, encrypted with AES-256. For each file, a .key file is associated, the file size is 48 bytes, which probably contains a passphrase + IV. Cannot…
Northumber
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0
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2 answers

Ensuring an encrypted file can be decrypted in the future

What is a suggested way to: Encrypt a file Put file on USB Give USB to a 3rd party who is not that tech savvy Someday in the future, somehow provide them with the password Ensure that if #4 happens a long from now, the 3rd party will still be able…
MrBob2022
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0
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2 answers

How to decrypt microSD after factory reset? I have all the family memories in the Camera folder!

I made a fatal mistake I encrypted my mobile SD four years ago. The phone had a problem a few days ago and I did a factory reset without decoding. The decryption key is no longer active in the settings! My camera folder contains over 5,000 photos…
morteza hamedani
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0
votes
1 answer

decrypt the code in portuguese

A friend of mine sent me this encrypted message and I have no idea how to decrypt it! And btw, to make things worse, the message is in portuguese, not…
milly
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0
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0 answers

Need some help with decryption

I've used x64dbg to work out decryption in a particular program. I've found where it changes the encrypted material into readable text but can't work out the best way to use this information to convert multiple files. Is it a standardized…
Richard S
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1 answer

Need to decode, don't have key

So my friend gave me this monster of a code but I dont know WHAT it is and they said it can be solved as is ... I've been working on it for a week and its making me mad. Got any ideas?…
Vampy Maria
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1 answer

wondering which encryption this is

I have this huge string…
gusids
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1 answer

I have key of encrypted text, but I don't know how to use it

I have the key for this encrypted text, but I have no idea how can I apply it to decrypt it. The key is: raul1235 Can someone please guide me how to use it to…
roxyy
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