Reality-Winner-bar

Earlier this year I blogged about Printer Identification Codes, which are one of the IT world’s best-kept secrets. As it seems, a US secret service has now used this technology to track down a whistleblower.

Unsolved-bar

US mathematics professor Craig Bauer has published a great book about unsolved cryptograms. Most of these crypto mysteries have been covered on this blog before.

Bruce-Kallick-2-bar

The Handycipher is an encryption algorithm that doesn’t require a computer program or a machine. But is it secure?

Bruce-Kallick-Handycipher-bar

Designing a secure and convenient encryption algorithm that doesn’t require a computer program or a machine is quite a challenge. The Handycipher is an interesting method of this kind.

Weierud-2-bar

Crypto history expert Frode Weierud has found a number of encrypted messages in an archive. Can we help him to decipher these cryptograms?

Harry+Caroline-Tissie+Jabber-bar

Tissie and Jabber as well as Harry and Caroline were two amorous couples, who exchanged encrypted messages via newspaper ads more than a century ago. Their encryption codes are unsolved to date.

Silkdress-Slater-bar

Last week I presented the mystery of an encrypted note found in an antique silk dress. Has the codebook used now been found?

MLH-Cryptogram-bar

A young man, who had disappeared from his home in California, sent an encrypted message from Israel to his parents. This cryptogram has been unsolved for over four decades. Can a reader decipher it?

Schaub-bar

A letter sent by some Oscar P. Schaub in the 1920s looks like it has been written in Hebrew or a similar script. However, even Hebrew experts can’t read it. Is it encrypted in a clever cipher?

Smolenice-Castle-bar

Yesterday and today about 25 European cipher history experts have met at Smolenice Castle in Slovakia. It was a great event.