Knowing that AES is a sysmmetrical block-cipher algorithm with a 128-bit block size, I think the answer for IV is still 16 bytes or 128 bits for AES 128, 192 and 256. Reading this stackoverflow Q&A it seems as if the size of the IV is the size of the block which is always 128 bit (= 16 bytes) in AES, even if the keysize is larger than the block

Jul 29, 2019 Java AES 256 Encryption and Decryption Example | Unlimited AES (Advanced Encryption Standard) is a strong symmetric encryption algorithm. AES supports key lengths of 128, 192 and 256 bit. In this article, we will learn AES 256 Encryption and Decryption. AES uses the same secret key is used for the both encryption and decryption. Secret Notes AES-256 - Apps on Google Play

Jun 27, 2020

Apr 24, 2017

AES 256 PB Encrypt Decrypt for Android - APK Download

java - Android encryption / decryption using AES - Stack Warning: This answer contains code you should not use as it is insecure (using SHA1PRNG for key derivation and using AES in ECB mode) Instead (as of 2016), use PBKDF2WithHmacSHA1 for key derivation and AES in CBC or GCM mode (GCM provides both privacy and integrity) Advanced Encryption Standard - Wikipedia AES is a variant of Rijndael, with a fixed block size of 128 bits, and a key size of 128, 192, or 256 bits. By contrast, Rijndael per se is specified with block and key sizes that may be any multiple of 32 bits, with a minimum of 128 and a maximum of 256 bits. AES operates on a 4 × 4 column-major order array of bytes, termed the state. How to do AES 256 Encryption & Decryption in Android Jun 27, 2020 Full-Disk Encryption | Android Open Source Project