Cach Giau Tin Nhan Trong Anh (Steganography, Mien Phi + Tren Trinh Duyet)

Steganography giau mot tin nhan van ban ngan ben trong cac diem anh cua mot buc anh thong thuong, nen buc anh trong nhu khong doi nhung bi mat mang theo ghi chu cua ban. Huong dan nay chi cach giau mot tin nhan trong PNG va doc lai sau do, tuy chon khoa bang mat khau - tat ca tren trinh duyet, nen buc anh va tin nhan khong bao gio roi khoi thiet bi cua ban.

Soat lai lan cuoi: 2026-06-16

Duoc soat boi doi ngu bien tap Mien phitoolOnline

Thuoc tinh	Gia tri
Dinh dang	Truc tuyen, khong cai dat, khong dang ky
Chi phi	Mien phi
Cong cu su dung	https://freetoolonline.com/image-tools/steganography.html

Cach giau mot tin nhan trong anh

Mo cong cu Steganography va giu che do o "Giau mot tin nhan trong anh".
Chon mot anh nen. PNG hoat dong tot nhat; anh lon hon chua duoc tin nhan dai hon.
Nhap tin nhan bi mat ban muon giau. Cong cu hien so ky tu toi da ma anh do chua duoc truoc khi nhung.
Neu muon, them mot mat khau de chi nguoi biet no moi doc lai duoc tin nhan.
Bam nut giau va tai ket qua ve. Giu no o dinh dang PNG.

Cach doc lai mot tin nhan da giau

Mo cung cong cu va chuyen che do sang "Hien mot tin nhan da giau".
Chon tep PNG da duoc tao bang cong cu nay.
Neu tin nhan da khoa, nhap mat khau. Van ban da giau se hien tren trang.

Tai sao ket qua phai giu la PNG

Tin nhan duoc luu trong bit it quan trong nhat cua moi diem anh - mot thay doi rat nho ma mat thuong khong thay. PNG khong mat du lieu, nen cac bit do duoc giu lai. Neu ban luu lai anh thanh JPG, hoac dua no qua mot trinh nen, cac bit bi ghi de va tin nhan da giau bi xoa. Phan lon ung dung mang xa hoi va nhan tin cung nen lai anh, vi vay hay gui PNG duoi dang tep thay vi anh neu ban can tin nhan ton tai.

Mot anh chua duoc bao nhieu van ban

Moi diem anh luu ba bit (mot o do, luc va lam), va moi ky tu dung muoi sau bit, nen dung luong tang theo so diem anh. Huong dan so bo:

Kich thuoc anh	Diem anh	So ky tu xap xi
64 x 64	4096	khoang 762
256 x 256	65536	khoang 12282
512 x 512	262144	khoang 49146

Neu tin nhan qua dai so voi anh da chon, cong cu se bao so toi da va dung lai thay vi cat bot van ban mot cach am tham.

No co rieng tu khong?

Co. Moi thu chay tren trinh duyet, ngay tren thiet bi cua ban; buc anh va tin nhan khong bao gio duoc tai len may chu. Luu y rang steganography giau su ton tai cua mot tin nhan truoc mot nguoi xem thong thuong, nhung mot nha phan tich quyet tam chay cac kiem tra thong ke van co the phat hien co du lieu, vi vay hay xem mat khau tuy chon la lop bao ve thuc su cho noi dung.

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