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Crypto currencies are all around us

Why not switch some of your virtual investment into physical goods?
Crypto(graphy) is at the center of all transactions today. And the technology is in fact very interesting (for those who thinks so).


© - crypto.dk - reproduction not allowed wihout permission

LATEST QUOTES FROM CRYPTO-XCHANGES BY WEBSERVICE/IF



BCH had asking price 862.5 EUR, 2018-05-24 15:43:06.876
BCH had asking price 1009.4 USD, 2018-05-24 15:43:06.876
DASH had asking price 289.0 EUR, 2018-05-24 15:43:06.876
DASH had asking price 339.981 USD, 2018-05-24 15:43:06.876
USDTZ had asking price 0.9999 USD, 2018-05-24 15:43:06.876
XETCZ had asking price 13.0 EUR, 2018-05-24 15:43:06.876
XETCZ had asking price 15.22 USD, 2018-05-24 15:43:06.876
XETHZ had asking price 500.79 EUR, 2018-05-24 15:43:06.876
XETHZ had asking price 585.89 USD, 2018-05-24 15:43:06.876
XLTCZ had asking price 103.7 EUR, 2018-05-24 15:43:06.876
XLTCZ had asking price 121.35 USD, 2018-05-24 15:43:06.876
XREPZ had asking price 34.344 EUR, 2018-05-24 15:43:06.891
XXBTZ had asking price 6419.0 EUR, 2018-05-24 15:43:06.891
XXBTZ had asking price 7515.2 USD, 2018-05-24 15:43:06.891
XXMRZ had asking price 141.97 EUR, 2018-05-24 15:43:06.891
XXMRZ had asking price 166.47 USD, 2018-05-24 15:43:06.891
XXRPZ had asking price 0.52379 EUR, 2018-05-24 15:43:06.891
XXRPZ had asking price 0.61311 USD, 2018-05-24 15:43:06.891
XZECZ had asking price 250.099 EUR, 2018-05-24 15:43:06.891
XZECZ had asking price 292.69 USD, 2018-05-24 15:43:06.891


Graphs are under construction







Crypto is about conscious decisions

In this field, the issue is not right or wrong decisions - but conscious decisions. You are only fully in charge of security if you also understand the limitations of your system. It allows you to act if any of the preconditions changes

Digital Signature using J2EE - source code samples explained


Adaptations in different forms. Assuming JDK 1.4+


The Danish government has attempted to introduce digital signature.

OCES is the official term for the offical danish digital signature project.

How digital signature works in J2EE explains through simple Java examples the basics in Digital Signature (public key cryptography) using J2EE.

PKCS#12 management using J2EE API provides source for a Java class handling most aspects of a file in PKCS#12 format.

CRL, PKCS#12, root certificate - using J2EE API provides source for a Java example checking into CRL (Certificate Revocation List), PKCS#12 information - and veryfying an entry in PKCS#12 using a root certificate.

These are practical examples. In reality, the issue is more complex with need to use TDC infrastructure (fx. PID_to_CVRid service) and more extensive validation using CA root certificate from a trusted source, etc.







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2004 (c) Valentini