Collaborate Disseminate
A while ago I was toying around with XOR ciphers and stumbled on the following construction. I want to understand the security properties/implications of this idea, and thusly under what circumstances (if any) I might viably use it.
Encod… Continue reading Security of simple XOR cipher [closed]
A while ago I was toying around with XOR ciphers and stumbled on the following construction. I want to understand the security properties/implications of this idea, and thusly under what circumstances (if any) I might viably use it.
Encod… Continue reading Security of simple XOR cipher [closed]
I happen to recall that CHACHA20 ciphers are not compliant with both NIST guidelines and FIPS/HIPAA standards. As used to be stated by htbridge.com SSL tests years ago. I just found similar information a similar note here and comments abou… Continue reading Why are CHACHA20 TLS ciphers not compliant with the NIST guidelines and FIPS/HIPAA standards?
Its known that cipher is made with LFRS. Cipher text is 868 bits long, and its known that the plaintext starts with "Dear Student", therefore we can get the keystream of first 84 bits. However, we do not know anything about the l… Continue reading LFSR, starting with a known sequence [migrated]
What size of initialization vector (IV) is needed for AES encryption? I am using either CCM or GCM modes.
–> for GCM I saw online it’s 12 bytes please correct me
–> I couldn’t find what is it for CCM
I just want to make sure what I know is correct about why WEP isnt secure.
When a client wants to send data to AP using WEP, the WEP key (which is the password the user uses to connect to wifi – so this is known to whoever is on the networ… Continue reading RC4 decryption with WEP
Where can I get the definitive list of weak ciphers? Various tools are listing ciphers as weak but these vary somewhat. Which CBC ciphers specifically currently suffer with known weaknesses and where can I get more information on this?
The… Continue reading Weak SSL/TLS Ciphers
I’m reading the GNU Privacy Handbook where it says:
A hybrid cipher uses both a symmetric cipher and a public-key cipher. It works by using a public-key cipher to share a key for the symmetric cipher. The actual message being sent is then… Continue reading Attacking Public Key Ciphers
I’m working on a cryptanalysis project for my professor, and I need some guidance. The assignment involves implementing one of the following types of attacks on a ciphertext encrypted with a symmetric key algorithm:
Chosen plaintext
Chose… Continue reading Help Needed with Chosen Plaintext Attack on AES-CTR
I sent a client hello indicating TLS1.3 support, and it contains a list of all ciphersuites that support TLS1.3, TLS1.2 and TLS1.1
And consider server negotiated TLS1.3 indicating serverHello.supported_versions=0304, but ciphersuite select… Continue reading server negotiating TLS1.3 but sent TLS1.2 ciphersuite