Why infamous Addtrust certificate is still not expired (same private key) for code signing?

As many of you know Addtrust certificate https://crt.sh/?id=1 expired 30 May 2020 as well as many other intermediate certs and now we have to update certs on many servers to either root cert https://crt.sh/?id=1199354 or using another chai… Continue reading Why infamous Addtrust certificate is still not expired (same private key) for code signing?

Is it possible to make an output of an encryption algorithm more susceptible to cryptoanalysis by altering input?

For example (very simplified one) usually encryption/decryption works like this:

encrypted_data = encrypt(data, key)
data = decrypt(encrypted_data, key)

I wonder, if it is possible to modify input data so that the function… Continue reading Is it possible to make an output of an encryption algorithm more susceptible to cryptoanalysis by altering input?