CENCIV

TheAESInitializationVector(IV)forsigningkeyproviderrequests.Thisisa128-bithexadecimalvaluerepresentedbya32-characterstring.KeyRotation ...,2016年9月19日—Themostsignificant8bytesoftheCounterBlockistheIV,whichissetfromtheIVdataintheencryptedBlock.Theleastsignificant8 ...,2024年3月5日—CENCAES-CTRorcenc:CENCProtectionSchemeusingAES128-bitkeys...IfIV_sizeisset,constantIVisignoredandeachsamplehasade...

參考資訊如下
Common Encryption (CENC) Output Filter

The AES Initialization Vector (IV) for signing key provider requests. This is a 128-bit hexadecimal value represented by a 32-character string. Key Rotation ...

WebM Encryption

2016年9月19日 — The most significant 8 bytes of the Counter Block is the IV, which is set from the IV data in the encrypted Block. The least significant 8 ...

Common Encryption · gpacgpac Wiki

2024年3月5日 — CENC AES-CTR or cenc: CENC Protection Scheme using AES 128-bit keys ... If IV_size is set, constant IV is ignored and each sample has a dedicated ...

CENC Common Encryption Methods and Algorithms Guide

2023年9月11日 — An initialization vector (IV) ensures an unique ciphertext for the same plaintext with the same key. Before encryption, the IV is XORed with ...

Decrypt video encrypted with FFmpeg cenc-aes

2021年1月18日 — How can I decrypt this video using other non-FFmpeg tool such as OpenSSL without the initialization vector (IV)? Or how can I obtain the IV?

ffmpeg 4.4 cenc-aes

2023年11月15日 — 加密参数：CENC-AES-CTR 加密方案使用一组加密参数来确保正确的解密。这些参数包括加密密钥、密钥标识符（KID）、加密索引、初始化向量（IV）等。加密参数 ...

PlayReady 內容加密模式

2023年9月16日 — 從4.0 版開始的PlayReady 用戶端支援AES CBC 金鑰，除了通用加密模式'cenc ... 在PlayReady 3.3 版和更早版本中，CTR 模式僅支援64 位IV (8 位元組IV) 。

Effects of IV on CENC(as PlayReady) · Issue #491

2018年10月17日 — IV affects CENC, or more precisely how the bits are encrypted using AES. It is DRM system agnostic. It should not affect PlayReady. If it works ...

Encryption & DRM with Multiple Keys

Multiple keys 'cenc' CENC encryption for DASH with Widevine and PlayReady ... IV. This is simply a file with 32 random bytes, where the first 16 bytes represent ...

Common Encryption

CENC AES-CTR or cenc: CENC Protection Scheme using AES 128-bit keys in ... If IV_size is set, constant IV is ignored and each sample has a dedicated IV. If ...