C2PA Content Credentials yog ib lub tshuab siv cryptography los txheeb xyuas content, pab sau tseg tias daim duab raug tsim, hloov kho thiab kos npe los ntawm lub cuab yeej twg. Koj siv tau Credentio los tshuaj xyuas cov ntaub ntawv no kiag hauv koj lub computer, tsim nyog rau cov duab rhiab uas tsis tsim nyog upload mus rau online service. Txawm li cas los, qhov kev txheeb xyuas keeb kwm duab tsis txhais tau tias qhov xwm txheej hauv daim duab yog qhov tseeb lossis daim duab tsis yog deepfake.
C2PA Content Credentials ua haujlwm li cas?
C2PA siv ib hom qauv hu ua C2PA Manifest, hos Content Credentials yog lub npe uas nkag siab yooj yim dua rau tus qauv ntawd. Manifest muaj ntau yam assertion — uas yog cov lus tshaj tawm txog keeb kwm, cuab yeej, software, kev hloov kho, cov duab siv ua feem thiab lub sijhawm ua tiav. Ib daim ntaub ntawv yuav muaj ntau Manifest kom qhia txog cov kauj ruam sib law liag hauv lub neej ntawm content (raws li C2PA Specifications).
Tus txheej txheem tseem ceeb muaj plaub theem:
- Lub cuab yeej thaij duab lossis software kho duab tsim cov ntaub ntawv keeb kwm.
- Cov ntaub ntawv no raug ntim ua Manifest, nrog hash function txuas rau cov ntaub ntawv duab.
- Manifest raug kos npe siv private key ntawm software, cuab yeej lossis lub koom haum uas muab tawm.
- Application txheeb xyuas siv signature, hash, digital certificate thiab trust list los tshuaj xyuas.
Yog cov ntaub ntawv duab lossis Manifest raug hloov, hash yuav tsis sib phim ntxiv lawm thiab signature yuav qhia qhov yuam kev. C2PA kuj sau tseg tau tias daim duab raug tsim tag nrho los ntawm AI, siv AI hauv kev kho, lossis tsuas raug txiav, hloov xim thiab hloov qhov loj.
Qhov tseem ceeb yog C2PA muab ib qho cim qhia txog kev ntseeg tau, tsis yog kev txiav txim txog cov ntsiab lus. Ib qho Manifest uas valid qhia tias cov ntaub ntawv tau kos npe tsis tau raug hloov txij li lub sijhawm kos npe thiab daim certificate tej zaum ntseeg tau raws li trust list uas raug siv. Nws tsis lees paub tias tus neeg kos npe tau piav qhia qhov xwm txheej hauv ntiaj teb tiag raug, thiab kuj tsis hloov tau kev txheeb xyuas xov xwm, kev sib piv nrog cov tim khawv lossis forensic analysis.
Yuav txheeb xyuas keeb kwm duab nrog Credentio hauv computer li cas
1. Npaj ib puag ncig
Credentio yog Google lub C++ open-source library rau kev tshuaj xyuas thiab txheeb xyuas C2PA. Raws li public repository, lub cuab yeej xav tau Git, Clang thiab Bazel; tam sim no txhawb ntau hom ntaub ntawv xws li JPEG, PNG, AVIF, HEIC, WebP, TIFF, MP4 thiab PDF. Qhov project tseem tab tom txhim kho nquag, yog li interface lossis kev ua haujlwm yuav hloov tau (raws li Credentio repository ntawm Google Source).
git clone https://mediaprovenance.googlesource.com/credentio
cd credentio
bazel build tools:c2pa_validateQhov command saum toj no compile tau command-line program c2pa_validate. Koj yuav tsum ua qhov no hauv ib qho development environment cais, tshuaj xyuas source code thiab lock version ua ntej muab siv rau hauv production workflow. Credentio tsis faib trust certificate list ua ntej; koj yuav tsum tau txais Trust List thiab TSA Trust List uas yog nom tswv los ntawm C2PA.
2. Khiav kev tshuaj xyuas duab
Yog daim duab JPEG nyob ntawm /duong-dan/anh.jpg, koj khiav tau:
bazel run tools:c2pa_validate --
--asset=/duong-dan/anh.jpg
--claim_signer_trust=/duong-dan/claim-trust.pem
--tsa_trust=/duong-dan/tsa-trust.pemLub cuab yeej yuav nyeem Manifest, assertion, signature thiab certificate chain kiag hauv computer. Thaum saib qhov tshwm sim, yuav tsum cais peb theem no: Well-Formed txhais tau tias daim ntaub ntawv muaj qauv uas nyeem tau; Valid txhais tau tias signature, hash thiab cov kev tshuaj xyuas uas tsim nyog yog valid; Trusted txhais tau tias certificate uas kos npe txuas tau rau Trust Anchor uas xaiv (raws li C2PA security documentation).
Txhawm rau tshuaj xyuas qhov tshwm sim, sim peb hom qauv: ib daim duab uas muaj valid Credential, ib daim duab uas raug hloov tom qab kos npe, thiab ib daim duab uas tsis muaj C2PA. Qhov xav tau yog: valid, integrity error thiab Credential not found raws lawv feem. Qhov kev sim no pab kom koj tsis muab “tsis muaj ntaub ntawv” yuam kev ua “ntaub ntawv raug dag.”
Cov kev txwv thaum siv C2PA los txheeb xyuas deepfake
Tsis muaj Credential tsis txhais tias daim duab yog cuav
Ntau lub social media platform, image editor lossis system hloov format yuav tshem tawm metadata. Kev compression, hloov qhov loj lossis xa daim duab hla ib qho workflow uas tsis txhawb C2PA kuj yuav ua rau Manifest ploj. Yog li, daim duab uas tsis muaj content authentication tsuas yog ib qho xwm txheej tsis tau muaj pov thawj provenance, tsis yog pov thawj tias daim duab yog cuav. Thaum optimize duab rau website, koj yuav tsum tshuaj xyuas file-export workflow kom tsis txhob txhob txwm rho metadata; kuj saib tau ntxiv txog txo server load thaum upload duab.
Tshuaj xyuas signature tseem yuav tsum ntsuas tus neeg kos npe
Ib qho signature uas valid tsuas qhia tias cov ntaub ntawv raug kos npe los ntawm ib qho identity lossis cuab yeej uas muaj certificate tsim nyog. Koj tseem yuav tsum nug tias: lub koom haum ntawd puas tsim nyog ntseeg, cov ntaub ntawv txog kev hloov kho puas tiav, thiab daim duab puas haum rau nws lub ntsiab lus? Rau content uas cuam tshuam txog kev dag ntxias, kev nyiag npe lossis kev tshaj tawm xov xwm ceev, yuav tsum txuas nrog kev txheeb xyuas los ntawm qhov chaw ywj pheej; saib ntxiv txog yuav tiv thaiv lag luam ntawm kev dag ntxias siv npe cuav li cas.
C2PA kuj tsis yog ib qho deepfake detector uas txheeb xyuas pixel. Nws tsis tuaj yeem nrhiav daim duab qub hauv Internet, tsis txiav txim tias puas muaj kev hloov ntsej muag, thiab tsis lees paub tias cov lus hais hauv daim duab yog qhov tseeb. Thaum tsim system ua haujlwm nrog content, yuav tsum txuas Credential nrog identity control, access control thiab software supply-chain protection, xws li cov hauv paus ntsiab lus hauv kev tiv thaiv server tiv thaiv AI-powered attack.
Daim checklist siv tau: Khaws daim qauv ntaub ntawv qub cia; siv lub cuab yeej hauv lub tshuab los tshuaj xyuas Manifest; txheeb xyuas qhov xwm txheej ntawm signature thiab Trust Anchor; nyeem keeb kwm kev kho kom raug; muab tus kheej ntawm tus tshaj tawm piv nrog lwm qhov chaw; ces mam li siv cov ntaub ntawv ywj pheej los ntsuam xyuas cov ntsiab lus. Nov yog txoj kev siv C2PA kom raug: pab kom taug qab tau keeb kwm thiab kuaj pom kev cuam tshuam, tsis yog muab xam tias yog “daim ntawv lo tiv thaiv kev dag” uas ntseeg tau tag nrho.
Cov ntaub ntawv siv
