The Principle & Realization of a Dual Encryption Method for Digital Images in Visual Basic
Guo Heng-chuan · Computer Knowledge and Technology · 2007
A dual-encryption method for digital images is introduced, which combines Xor operations and bit-shifting operations. It manipulates the binary pixel array of an image according to a pseudo random sequence seeded by a user's password, and offers a reversible encryption-decryption mode. Its full implementation in Visual Basic is provided, as well as an encrypting example.