All Questions
Tagged with encryptionfile-encryption
239 questions
1vote
1answer
59views
Exposing size of last chunk in RSA file encryption
So I'm implementing RSA encryption. I'm processing input in chunks of known constant size (depends on modulus) but the last chunk might be smaller so I save its size in plaintext at the end of output ...
- 113
3votes
1answer
244views
How to generate a Symmetric Key on the Secure Enclave of iOS devices and use it to encrypt data
I'm working on a secure app that uses the user's master password to derive a symmetric key to encrypt all the user information. I want to add FaceId support now, and the approach I was thinking of was ...
- 133
1vote
1answer
125views
Is it possible to use arbitrary file(s) to encrypt another file?
i.e. To allow an unofficial software modification (which is too extensive to distribute as delta/patch files) to be distributed while ensuring the user owns the original software, it would be ...
- 119
0votes
1answer
71views
End to end encryption
Can ISPs see file names and file types that are being downloaded from zero knowledge end to end encrypted cloud storage folders like mega.
0votes
2answers
233views
Should you encrypt sensitive files even with FDE?
I'm in the process of trying to make my current laptop setup more secure, especially I'm planning to finally use FDE and enable Secure Boot. However, I'm still unsure on how to handle sensitive, ...
0votes
0answers
116views
NTRU - How is the master key and session key generated?
I am learning the PKC topics and would like to understand about the master and session key generation process regarding NTRU. Let's make it a scenario, if a user wants to register during the ...
1vote
1answer
1kviews
GPG can't decrypt my data because of an invalid packet
I have an encrypted data containig some of my data that I am unable to decrypt. It is archived with tar, compressed with gzip and encrypted with gnupg. Today I tried to decrypt it with gpg and it ...
0votes
0answers
128views
Why doesn't file/folder encryption work the way I imagine it should? Can I have the UX I want? Tell me what's wrong with this idea
I have been looking around at various encryption schemes, and I haven't found anything exactly like what I want in terms of user experience. If what I want isn't a thing, I assume it's been thought of,...
- 101
0votes
0answers
142views
Choosing Encryption Strategies for Secure Long-Term Storage of Sensitive Data
When considering external drives for secure long-term storage of sensitive data, what are the pros and cons of using the same password for encrypting all files versus using random passwords for each ...
- 173
3votes
2answers
1kviews
TPM - ECC based encryption / decryption using the public key
Our device comes with a device certificate which was signed with our private registration authority (CA). The private key (type ECC) was generated on the device itself - to be more specific directly ...
- 271
1vote
1answer
311views
How to protect files in use on a system powered on from physical theft or tampering?
I'm in the process of figuring out an encryption strategy for a personal Linux system. My laptop is almost always on, or in sleep mode, except for longer travels. My main threats are theft of my ...
1vote
1answer
178views
AEAD: Authenticating a digest of my data instead the data itself
Relevant question for Python: Stack Exchange: https://stackoverflow.com/questions/75739308/aead-authentication-with-huge-input-that-doesnt-fit-into-ram Top Answers: https://topanswers.xyz/python?q=...
- 121
0votes
1answer
269views
How does Ransomware encrypt files? [duplicate]
I have a question about how ransomware works. According to the authors of this paper: https://www.cise.ufl.edu/~traynor/papers/scaife-icdcs16.pdf (page 2 - 3) , class C is: ransomware reads the ...
1vote
1answer
2kviews
Android File Encryption without screen lock
I am trying to understand the FBE Key generation and verification process at every boot. My device is going to be handled without a lock screen (Android 11 with FBE + Metadata Encryption Enabled), so ...
0votes
2answers
591views
Ransomware public key: can I find the respective private key?
I got a ransomware called StopDjvu. On my PC, I have found the public key that is used by the malware (maybe RSA hardcoded). Is it possible to extract the private key from the public key?
