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Predictable Initialization Vector لقطات الشاشة

عن Predictable Initialization Vector

يتم وصف استخدام IV بواسطة طرق التشغيل

In cryptography, an initialization vector (IV) or starting variable (SV is a fixed-size input to a cryptographic primitive that is typically required to be random or pseudorandom. Randomization is crucial for encryption schemes to achieve semantic security, a property whereby repeated usage of the scheme under the same key does not allow an attacker to infer relationships between segments of the encrypted message. For block ciphers, the use of an IV is described by the modes of operation. Randomization is also required for other primitives, such as universal hash functions and message authentication codes based thereon.

Some cryptographic primitives require the IV only to be non-repeating, and the required randomness is derived internally. In this case, the IV is commonly called a nonce (number used once), and the primitives are described as stateful as opposed to randomized. This is because the IV need not be explicitly forwarded to a recipient but may be derived from a common state updated at both sender and receiver sides. (In practice, a short nonce is still transmitted along with the message to consider message loss.) An example of stateful encryption schemes is the counter mode of operation, which uses a sequence number as a nonce.

تحديث لأحدث إصدار 1.0.0

Last updated on 13/07/2021

Minor bug fixes and improvements. Install or update to the newest version to check it out!

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طلب Predictable Initialization Vector تحديث 1.0.0

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Android 4.1+

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