do i need iv to decrypt?
433730
After the first block is decrypted, you still have an intermediate value which has been XORed with the plaintext — without this, you have little hope of recovering the plaintext. However, you do not need the IV to decrypt subsequent blocks.
1003694
Cryptography is all about encryption and decryption. Encryption/Decryption requires a key. ... Security also depends on key/password, to keep data secure.
1227699
An initialization vector (IV) is an arbitrary number that can be used along with a secret key for data encryption. This number, also called a nonce, is employed only one time in any session. ... The IV prevents the appearance of corresponding duplicate character sequences in the ciphertext.
1219056
It has been widely publicized that TLS (any version less than or equal to 1.0), using AES-CBC mode has been recently cracked. ... The current crack is specific to TLS, versions less than or equal to 1.0. We support both TLS 1.1 and TLS 1.2.
733412
How AES encryption works. AES includes three block ciphers: AES-128, AES-192 and AES-256. AES-128 uses a 128-bit key length to encrypt and decrypt a block of messages, while AES-192 uses a 192-bit key length and AES-256 a 256-bit key length to encrypt and decrypt messages.
699534
Although there is no direct way to encrypt an existing unencrypted volume or snapshot, you can encrypt them by creating either a volume or a snapshot. If you enabled encryption by default, Amazon EBS encrypts the resulting new volume or snapshot using your default key for EBS encryption.
36529
bcrypt is designed to be slow and not to allow any shortcut. It takes more effort to brute force attack the password. The slower the algorithm, the less guesses can be made per second. The extra time won't be noticed by a user of the system, but will make it harder to crack the password.
1145723
The mobile encryption app NQ Vault has been in the news for bad reasons. ... These encryption apps usually offer a vault with your desired password. You can push any secret files to this vault and they would be secure, as the data present in vault is encrypted and would decrypt only when the correct password is entered.
253084
The keys come from the Certification Authority Public Keys (CAPK), and they expire periodically. Your card reader will reject transactions (decline) when an incorrect or expired CAPK is used.
805250
The Decrypted Cache Key is necessary to open the loot chest that the final boss drops. So, you don't need to hand in the key anywhere special, but you won't be able to open that final loot chest without the Destiny 2 Decrypted Cache Key.
1433983
No, I don't think so. The actual advice in that xkcd comic are to use mnemonics that are easy for you to remember and generate password as long as you can remember them. Those are basic password advice anywhere, and will always stand true (even the quoted Schneier's method uses these two basic facts).
1242198
The short answer is no. Merchants can choose whether to require the CVV code. ... If you're using a card in person, the CVV typically isn't required. Do not voluntarily share your CVV for an in-person transaction, which could enable a scammer to steal your data to complete unauthorized transactions.
687876
Data encryption translates data into another form, or code, so that only people with access to a secret key (formally called a decryption key) or password can read it. Encrypted data is commonly referred to as ciphertext, while unencrypted data is called plaintext.
1011926
In cryptography, a cipher (or cypher) is an algorithm for performing encryption or decryption—a series of well-defined steps that can be followed as a procedure. An alternative, less common term is encipherment. To encipher or encode is to convert information into cipher or code.
357604
The number of required IVs depends on the WEP key length, and it also depends on your luck. Usually, 40-bit WEP (64 bit key) can be cracked with 300,000 IVs, and 104-bit WEP (128 bit key) can be cracked with 1,500,000 IVs; if you're out of luck you may need two million IVs, or more.
633977
The main disadvantage of using a shared key in encryption is that you cannot use it to ensure non-repudiation. If you got a message and you are able to decipher it, there is no proof that the sender did encrypt it, because one can still argue you encrypted it yourself. This is fairly easy to understand.
465552
To decrypted files, you need to obtain the private key. The single copy of the private key, with will allow you to decrypt the files, is located on a secret server on the internet; The server will destroy the key within 48 hours after encryption completed.