Collaborate Disseminate
You have a 2048 bit private key. You generate an IV for the message you are going to encrypt. Next, you take the first block of plaintext and SHA256(IV + 2048 bit key). You use that hash as a key to encrypt the first block of plaintext … Continue reading An attempt at using AES as a stream cipher
Can a specific table in a database be flagged as immune to backups so that an attacker who has compromised not only your database and web server application source code, except also all of your on-site database backups does not have access… Continue reading Can a specific table be made immune to backups?
You have a User table:
UserID (auto-incrementing Integer)
Password hash
LastLogin
All related tables are linked by the UserID.
You also have a Username table:
Username
Salt
IncorrectLoginCount
LockedUntil
etc.
A user creates an account. … Continue reading Storing Username and salt in separate table
Since a single hardware pass of an XOR with a 64 bit key is very fast, would Triple DES-X using seven 64 bit keys used in the following manner be virtually identical in terms of code size, memory consumption, and execution speed to 3DES?
… Continue reading Would Triple DES-X with 7 keys be much slower than standard Triple DES? [migrated]