Giau du lieu vao hinh anh

Co nhieu cach ma hoa khac nhau de bao mat du lieu, trong do thu vi nhat la cat chung vao cac file hinh anh bitmap (BMP). De thuc hien duoc dieu nay can su ho tro cua phan mem Steganography, san pham mien phi cua tac gia Nasyrov Renat. Dung luong 188 KB, tai ve tu dia chi: http://kolmck.net/Components/crypto/Stega10.zip .

Sau khi giai nen vao mot thu muc xac dinh, mo thu muc nay ra, khong can cai dat ma co the su dung ngay. Kich hoat file Stegas.exe, trong giao dien cua chuong trinh bam menu FileLoad Bitmap chi den vi tri file dang BMP. File nay co dung luong cang lon thi cang chua duoc nhieu file an vao trong va nguoc lai. Vi vay, neu file hinh anh BMP qua be ma file muon giau vao trong qua lon chuong trinh se thong bao loi khong du bo nho (No free memory).

Sau khi da nap hinh tiep tuc bam FileAdd data file chi den nhung file du lieu muon nap vao hinh. Ke tiep bam FileSave bitmap dat ten cho file hinh moi.

Muon lay du lieu ra khoi hinh cung su dung Steganography. Nap hinh vao chuong trinh, bam chon ten file can trich xuat o danh sach ben phai. Bam FileExtract file chi den vi tri luu.

Ta Xuan Quan