- Th ey to va phtic lui xA Nhieu nuoc voi he th6ng cham s6 cy to qu6c gia dang danh gia va img dung the thong minh de giam cac chi phi lien
2.3.Chit IcS, so va dich vy chirng thyc chit ky s
2.3.1. Tjng quan ve cis& kf, align tir va chti ky so
Cling voi su phat then cua thucmg mai dien tir, cac giao dich tren giay
to dan clan Chuyen sang giao dich bang 'cac thong diep dir lieu (data message). Tuy nhien, van a sir dung chimg tir dien tir (electronic documents) not rieng hay thong diep du lieu not Chung con g4p phai mit so
can tra nhu: xac thuc cac ben trong giao dich (identification), bao mat va phan quyen truy cap cac thong diep dir lieu (entitlements), dac biet la viec sir dung chit 14 s6 trong giao dich dien tir nham xac dinh trach nhiem cac ben trong giao dich dien tir (digital accountability).
Chu 14r s6 sir dung ding nghe khea cong khai (PKI — public key infrastructure) ngay cang dirge sir dung rang rai tren the giai va dugc coi la met trong nhung cong nghe tot nhat cc') kha Wang khac phpc cac van de tren trong giao dich dien tir. Vai cong nghe nay, chit ky s6 dirge coi la cong cu an toan, hieu qua va a sir dung d6i von cac t6 chirc va ca nhan khi tien hanh cac giao dich dien tir. Tuy nhien, viec sir dung chir IcSr s6 doi hoi phai luu nhieu van de trong do co viec phai nam vfmg quy trinh tao lap chit ks, s6.
2.3.1.1. Chit kji so va vai tro cua chit kfi so trong giao dich dien to
Chit ks, teen giiy ph6 bien nhAt la clang chit ksi vi& tay (handwritten signatures) tren giay. Ben cph nhiing van de lien quan den phap luat va hap d6ng, chit ky viet tay dugc sir dung de dam bao cac chirc nang:
- Gan chit ky vai met ca nhan cu the;
- The hien su cam ket cua ca nhan do von met van ban cu the; - Dam bao su toan ven dm van ban sau khi da
Du Idiong dam bao cac chirc Wang tren met each hoan toan tuyet d6i, chit ky tren giay d'a va dang dugc sir dung rang rai trong cac giao dich thucmg mai va phi thuang mai. Viec nay met phan do ban chit to nhien cua viec ky tay tren giay, met phan do nhitng su kien có the dugc thuc hien de hO trg viec 14r bang tay d6i vai cac van ban quan tong nhu sir dung nhan chimg, mau giAy dac biet, du, niem phong, a 14 ket ding khai... nham dam bao tinh xac thuc ciia cam ket dugc thira nhan phong khi xay ra tranh chip sau nay.
Ban than chit ky tren giAy khong coy Conghia gi ye mat ngon tir. Them chi viec gia mao chit lcSr tren giay CO the dugc thut hien kha a clang, dac