Assume that you design a new affine cipher where you encrypt three letters at a time, where your alphabet is
{‘A’:0, ‘B’:1, ‘C’:2, ‘D’:3, ‘E’:4, ‘F’:5, ‘G’:6, ‘H’:7, ‘I’:8, ‘J’:9, ‘K’:10, ‘L’:11, ‘M’:12, ‘N’:13, ‘O’:14, ‘P’:15, ‘Q’:16, ‘R’…
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…
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…
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…
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…
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…
Nexpose reports the following vulnerability:
TLS/SSL Server Supports The Use of Static Key Ciphers. Negotiated with the following insecure cipher suites:
TLS 1.2 ciphers: TLS_RSA_WITH_AES_128_GCM_SHA256
TLS_RSA_WITH_AES_256_GCM_SHA384
Bu…
hmac-sha256, hmac-sha256@ssh.com, hmac-sha2-256, hmac-sha2-256-etm@openssh.com, hmac-sha512, hmac-sha512@ssh.com, hmac-sha2-512, hmac-sha2-512-etm@openssh.com
Can someone help in ordering the above ciphers by security level?
I am not a security expert, so please forgive me if the question is too obvious. We have been working with Blowfish to encrypt some of our files. We recently updated our very old OpenSSL version from 1.1.1 to 3.0.12 and we found out that B…
