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Results tagged with encryption
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user 249490
Encryption is the process of transforming plaintext using a cipher to make it unreadable to anyone except those possessing the key.
5
votes
Why use an IV when the message length is only one block?
Now that I can comment I am taking a part of my answer to comment
IV makes your encryption probabilistic and pseudo-random. … But semantic insecurity inherent in fully deterministic encryption scheme still remains if you do not use IV. …
- 309
2
votes
Using Private Key for encryption
If some message can be recovered by using some publicly available information, it is not encryption.
BECAUSE, the goal of encryption is confidentiality. … Not all schemes allow both signatures and encryption schemes in similar ways but the question was about RSA so I will leave it here. …
- 309
1
vote
Naming encrypted files in the cloud, without leaking info about their content
File Identification key FIDK = HKDF-expand(FK,"fidk") and Encryption Key EK = HKDF-expand(FK,"ek") or something like that. …
- 309
0
votes
How to send a fixed size encrypted message to be broadcast to multiple (known) recipients wi...
One way that comes to my mind is using methods like Diffie-Hellman tree, to generate a Diffie Hellman key-pair which is shared between all recipients. It is then used by the sender to send message. Bu …
- 309
0
votes
Nonce in Aes-gcm AAD
All you need for GCM is use the same AAD used during encryption, during decryption if you want to pass authentication. …
- 309
0
votes
how do i find the number of possible keys / password to decrypt a plain text
In does not matter how many rounds of caesar cipher you use, effectively it still becomes one single round with key (k1+k2+k3 ....kn) mod a, where a is the number of alphabets, 26 in English alphabet. …
- 309
0
votes
Need some clarification regards end-to-end encryption process
basically in nutshell, end-to-end encrypted systems need something which use the long term private/public keys for authentication but use ephemeral key pairs for actual session establishment and data encryption …
- 309