https://community.nxp.com/t5/TapLinx-SDK-TagWriter-and/Protecting-SLIX2-using-TapLinx/m-p/2246252#M230 <P>Hi,<BR />I'm having a problem with protecting SLIX2 by a write password from overwriting. Even when I protect the page I am able to overwrite the tag with Android NXP Tag Writer, which makes me think that I didn't protect all the pages correctly.<BR />Here's the code that I am using:</P><LI-CODE lang="java">tag.getReader().connect(); randomNumber = tag.getRandomNumber( NFCV_FLAG_DATARATE | NFCV_FLAG_ADDRESS); xored_password = CustomModules.getUtility().xor(CustomModules.getUtility().append(randomNumber, randomNumber),{0, 0, 0, 0}); tag.setPasswordRead(xored_password, NFCV_FLAG_DATARATE | NFCV_FLAG_ADDRESS); tag.setPasswordWrite(xored_password, NFCV_FLAG_DATARATE | NFCV_FLAG_ADDRESS); for (int i=0;i&lt;79;++i) { // based on SLIX2 docs there's 79 blocks, i've also tried to use 2 "pages" but it's not better tag.protectPage((byte)i, (byte)0x10, NFCV_FLAG_DATARATE | NFCV_FLAG_ADDRESS); } tag.writePasswordWrite(newPassword, NFCV_FLAG_DATARATE | NFCV_FLAG_ADDRESS);</LI-CODE><P>All of the above functions succeed, yet it's possible to break the tag without write password.</P> Sun, 23 Nov 2025 00:39:11 GMT tomcc 2025-11-23T00:39:11Z https://community.nxp.com/t5/TapLinx-SDK-TagWriter-and/Protecting-SLIX2-using-TapLinx/m-p/2246252#M230 <P>Hi,<BR />I'm having a problem with protecting SLIX2 by a write password from overwriting. Even when I protect the page I am able to overwrite the tag with Android NXP Tag Writer, which makes me think that I didn't protect all the pages correctly.<BR />Here's the code that I am using:</P><LI-CODE lang="java">tag.getReader().connect(); randomNumber = tag.getRandomNumber( NFCV_FLAG_DATARATE | NFCV_FLAG_ADDRESS); xored_password = CustomModules.getUtility().xor(CustomModules.getUtility().append(randomNumber, randomNumber),{0, 0, 0, 0}); tag.setPasswordRead(xored_password, NFCV_FLAG_DATARATE | NFCV_FLAG_ADDRESS); tag.setPasswordWrite(xored_password, NFCV_FLAG_DATARATE | NFCV_FLAG_ADDRESS); for (int i=0;i&lt;79;++i) { // based on SLIX2 docs there's 79 blocks, i've also tried to use 2 "pages" but it's not better tag.protectPage((byte)i, (byte)0x10, NFCV_FLAG_DATARATE | NFCV_FLAG_ADDRESS); } tag.writePasswordWrite(newPassword, NFCV_FLAG_DATARATE | NFCV_FLAG_ADDRESS);</LI-CODE><P>All of the above functions succeed, yet it's possible to break the tag without write password.</P> Sun, 23 Nov 2025 00:39:11 GMT https://community.nxp.com/t5/TapLinx-SDK-TagWriter-and/Protecting-SLIX2-using-TapLinx/m-p/2246252#M230 tomcc 2025-11-23T00:39:11Z